| [X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THESECURITIES EXCHANGE ACT OF 1934 for the fiscal year ended December 31, 2012                  |
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| OR                                                                                                                                                                   |
| [  ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THESECURITIES EXCHANGE ACT OF 1934 for the transition period from ______to______ |
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| Delaware                                                      | 06-1393745                          |
|---------------------------------------------------------------|-------------------------------------|
| (State or other jurisdictionof incorporation or organization) | (I.R.S. EmployerIdentification No.) |

| Title of class               |
|------------------------------|
| Common Stock($.01 par value) |

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|   | COSI, INC.        |                                                                                                                        |
|--------|-------------------|-----------------------------------------------------------------------------------------------------------------------------|
|   |              |                                                                                                                        |   |
|   |              |                                                                                                                        |   |
|   | By:               | /s/ WILIAM KOZIEL                                                                                                      |   |
|   |              | William KozielChief Financial Officer, Secretary and Treasurer(Principal Financial Officer andPrincipal Accounting Officer) |   |
|   |              |                                                                                                                        |   |
|   | Date:   |  March 15, 2013                                                                                                        |   |

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|  EXHIBIT NUMBER |   |  DESCRIPTION OF EXHIBIT                                                                                                                                                                                                                                                                         |
|----------------------|--------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 2.1                  |   | Merger Agreement by and among Xando, Incorporated, Xando Merger Corp. and Cosi Sandwich Bar, Inc. dated as of October 4, 1999 (Filed as Exhibit 2.1 to the Company’s Registration Statement on Form S-1, file #333-86390).                                                           |
| 3.1                  |   | Amended and Restated Certificate of Incorporation of Cosi, Inc. (Filed as Exhibit 3.1 to the Company’s Annual Report on Form 10-K for the period ended December 30, 2002).                                                                                                           |
| 3.2                  |   | Amended and Restated By-Laws of Cosi, Inc. (Filed as Exhibit 3.1 to the Company’s Quarterly Report on Form 10-Q for the fiscal quarter ended October 1, 2007).                                                                                                                            |
| 4.1                  |   | Form of Certificate of Common Stock (Filed as Exhibit 4.1 to the Company’s Registration Statement on Form S-1, file #333-86390).                                                                                                                                                          |
| 4.2                  |   | Rights Agreement between Cosi, Inc. and American Stock Transfer and Trust Company as Rights Agent dated November 21, 2002 (Filed as Exhibit 4.2 to the Company’s Annual Report on Form 10-K for the period ended December 30, 2002).                                            |
| 4.3                  |   | Amended and Restated Registration Agreement, dated as of March 30, 1999 (Filed as Exhibit 4.3 to the Company’s Registration Statement on Form S-1, file #333-86390).                                                                                                                 |
| 4.4                  |   | Supplemental Registration Rights Agreement, dated as of August 5, 2003 by and among the Company and the parties thereto (Filed as Exhibit 4.4.2 to the Company’s Registration Statement on Form S-1, file #333-107689).                                                              |
| 4.5                  |   | Amendment No. 1 to Rights Agreement dated as of November 21, 2002, by and between Cosi, Inc. and American Stock Transfer and Trust Company, as rights agent (Filed as Exhibit 4.3 to the Company’s Quarterly Report on Form 10-Q for the fiscal quarter ended March 31, 2003).  |
| 4.6                  |   | Amendment dated as of January 6, 2010, to Rights Agreement dated as of November 21, 2002, between Cosi, Inc. and American Stock Transfer Company, as rights agent (Filed as Exhibit 4.1 to the Company’s Current Report on Form 8-K dated January 6, 2010).                               |   |
| 10.1                 |   | Cosi, Inc. 2005 Omnibus Long-Term Incentive Plan (Filed as Exhibit C to the Company’s Proxy Statement on Schedule 14A filed on March 31, 2005, file #000-50052.                                                                                                                           |
| 10.2                 |   | Cosi Employee Stock Purchase Plan (Filed as Exhibit 10.2 to the Company’s Registration Statement on Form S-1, file #333-86390).                                                                                                                                                           |
| 10.3                 |   | Cosi Non-Employee Director Stock Incentive Plan (Filed as Exhibit 10.3 to the Company’s Registration Statement on Form S-1, file #333-86390).                                                                                                                                             |
| 10.4                 |   | Cosi Sandwich Bar, Inc. Incentive Stock Option Plan (Filed as Exhibit 10.4 to the Company’s Registration Statement on Form S-1, file #333-86390).                                                                                                                                         |
| 10.5.1               |   | Terms of Employment between Cosi, Inc. and William E. Koziel, effective as of August 17, 2005 as described in the Company’s Current Report on Form 8-K (Filed on August 23, 2005).                                                                                                        |
| 10.5.2               |   | Employment agreement, dated as of September 15, 2007 by and between the Company and James F. Hyatt (Filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K, dated September 18, 2007).                                                                                         |
| 10.5.3               |   | General Separation and Release Agreement by and between the Company and Christopher Ames, dated August 26, 2008 (Filed as Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q for the fiscal quarter ended September 29, 2008).                                                   |   |
| 10.5.4               |   | General Separation and Release Agreement by and between the Company and Christopher Carroll, dated August 26, 2008 (Filed as Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q for the fiscal quarter ended September 29, 2008).                                                     |   |
| 10.5.5               |   | Form of Indemnification Agreement, dated as of December 19, 2008 by and between the Directors and Officers of the Company (filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K, dated December 18, 2008).                                                                   |   |
| 10.5.6               |   | Change in Control Severance Agreement, dated as of December 18, 2008 by and between William Koziel and the Company (filed as Exhibit 10.2 to the Company’s Current Report on Form 8-K, dated December 18, 2008).                                                                          |   |
| 10.5.7               |   | Change in Control Severance Agreement, dated as of December 18, 2008 by and between Vicki Baue and the Company (filed as Exhibit 10.2 to the Company’s Current Report on Form 8-K, dated December 18, 2008).                                                                              |   |

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|   EXHIBIT NUMBER |   |   DESCRIPTION OF EXHIBIT                                                                                                                                                                                                                                                                                                                         |   |
|-----------------------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|
| 10.5.8                |   | Change in Control Severance Agreement, dated as of December 18, 2008 by and between Paul Bower and the Company (filed as Exhibit 10.2 to the Company’s Current Report on Form 8-K, dated December 18, 2008).                                                                                                                               |   |
| 10.5.9                |   | Change in Control Severance Agreement, dated as of December 18, 2008 by and between Becky Iliff and the Company (filed as Exhibit 10.2 to the Company’s Current Report on Form 8-K, dated December 18, 2008).                                                                                                                              |   |
| 10.5.10               |   | First Amendment to Employment Agreement, dated as of December 18, 2008 by and between the Company and James Hyatt (filed as Exhibit 10.5 to the Company’s Current Report on Form 8-K, dated December 18, 2008).                                                                                                                            |   |
| 10.5.11               |   | Form of Purchase Agreement, dated as of September 28, 2009, for Jim Hyatt, Bill Koziel, Vicki Baue, Paul Bower, Becky Iliff, Maggie Martensen, Bob Merritt, Creed Ford, Mark Demilio, Karl Okamoto and Mike O’Donnell (Filed as Exhibit 10.1 to the Company’s Registration Statement on Form S-3 (Commission File No. 333-162233)).  |   |
| 10.5.12               |   | General Separation and Release Agreement by and between the Company and James F. Hyatt, dated August 31, 2011 (Filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K, dated September 1, 2011).                                                                                                                                |
| 10.5.13               |   | Employment Agreement, dated as of September 23, 2011 by and between the Company and Mark Demilio, (Filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K/A, dated September 23, 2011).                                                                                                                                         |
| 10.5.14               |   | Compensatory Agreement, dated as of September 22, 2011 by and between Cosi, Inc. and William E. Koziel, (Filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K, dated September 23, 2011).                                                                                                                                     |
| 10.5.15               |   | Employment Agreement, dated as of December 12, 2011 by and between the Company and Carin L. Stutz, (Filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K, dated December 14, 2011).                                                                                                                                           |
| 10.5.16               |   | Agreement, dated as of December 12, 2011 by and between the Company and Stephen F. Edwards, (Filed as Exhibit 10.2 to the Company’s Current Report on Form 8-K, dated December 14, 2011).                                                                                                                                                  |
| 10.6.1                |   | Foodservice Distribution Agreement between Cosi, Inc. and Distribution Market Advantage, Inc. dated as of November 1, 2005. (1)                                                                                                                                                                                                                  |
| 10.6.2                |   | Amendment to Foodservice Distribution agreement between Cosi, Inc. and Distribution Market Advantage, Inc. dated as of May 28, 2010, (Filed as Exhibit 10.6.2 to the Company's Annual Report for the fiscal year ended January 2, 2012).                                                                                                         |
| 10.7.1                |   | Cosi, Inc. Form of Area Developer Franchise Agreement (Filed as Exhibit 10.6 to the Company’s Quarterly Report on Form 10-Q for the fiscal quarter ended July 4, 2005).                                                                                                                                                                    |
| 10.7.2                |   | Cosi, Inc. Form of Area Developer Franchise Agreement (Filed as Exhibit 10.6 to the Company’s Quarterly Report on Form 10-Q for the fiscal quarter ended July 4, 2005).                                                                                                                                                                    |
| 10.8                  |   | Form of Senior Secured Note and Warrant Purchase Agreement (Filed as Exhibit 10.7 to the Company’s Registration on Form S-1, file #333-86390).                                                                                                                                                                                             |
| 10.9                  |   | Securities Purchase Agreement dated as of April 27, 2004 (Filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K, dated April 28, 2004).                                                                                                                                                                                        |
| 10.10                 |   | Form of Restricted Stock Award Agreement (Filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K, dated June 6, 2005).                                                                                                                                                                                                          |
| 10.11                 |   | Asset Purchase and Sale Agreement, dated April 27, 2010, by and among Cosi, Inc., Cosi Sandwich Bar, Inc., Capitol C Holdings LLC and Capitol C Restaurants LLC. (Filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K, dated April 30, 2010)                                                                                 |
| 16                    |   | Letter from Ernst & Young LLP to the Securities and Exchange Commission, dated as of August 13, 2004, acknowledging its agreement with the statements made in Current Report on Form 8-K (Filed as Exhibit 16 to the Company’s Current Report on Form 8-K, dated August 13, 2004).                                                     |
| 21                    |   | Subsidiaries of Cosi, Inc. (Filed as Exhibit 21.1 to the Company’s Registration Statement on Form S-1, file #333-86390)                                                                                                                                                                                                                    |
| 23.1*                 |   | Consent of BDO USA, LLP,  Independent Registered Public Accounting Firm                                                                                                                                                                                                                                                                |
| 31.1*                 |   | Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                          |
| 31.2*                 |   | Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                                                          |
| 32.1**                |   | Certification of the Chief Executive Officer and Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                                              |

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|   EXHIBIT NUMBER |   |   DESCRIPTION OF EXHIBIT                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
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| 101***                |   | The following financial information, formatted in Extensible Business Reporting Language (XBRL): (i) Consolidated Balance Sheet as of December 31, 2012 and January 2, 2012, (ii) Consolidated Statements of Operations and Comprehensive Loss for the years ended December 31, 2012, January 2, 2012, and December 27, 2010, (iii) Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2012, January 2, 2012, and December 27, 2010, (iv) Consolidated Statements of Cash Flows for the years ended December 31, 2012, January 2, 2012, and December 27, 2010, and (v) Notes to Consolidated Financial Statements. In accordance with Regulation S-T, the XBRL-related information in Exhibit 101 to this Annual Report on Form 10-K shall be deemed to be “furnished” and not “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, and shall not be deemed part of a registration statement, prospectus or other document filed under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filings.  |

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