Nimbus Labs local coding models

Nimbus-9B-v2.1 GGUF

Text-only llama.cpp artifacts for Nimbus-9B-v2.1. Q5_K_M is the quality-first local default; Q4_K_M is listed only where it actually exists.

Choose a Nimbus model

Model Best fit Transformers GGUF MLX
Nimbus-2B Fast drafting and focused edits Nimbus-Labs/Nimbus-2B Nimbus-Labs/Nimbus-2B-GGUF Nimbus-Labs/Nimbus-2B-MLX-5bit
Nimbus-4B Balanced implementation and debugging Nimbus-Labs/Nimbus-4B Nimbus-Labs/Nimbus-4B-GGUF Nimbus-Labs/Nimbus-4B-MLX-5bit
Nimbus-9B v2.1 Deeper coding and reasoning Nimbus-Labs/Nimbus-9B-v2.1 Nimbus-Labs/Nimbus-9B-v2.1-GGUF Nimbus-Labs/Nimbus-9B-v2.1-MLX-5bit

Nimbus family download footprint

The adjacent assets/nimbus-family-footprint.json contains the plotted values. Download size is not runtime memory: context cache and runtime buffers require additional capacity.

Downloads

File Role Bytes SHA-256
Nimbus-9B-v2.1-BF16.gguf BF16 reference 17,920,696,672 (17.92 GB) 47ef4cd04c506292785131fff06d5d5d502c082347a44380c81cfe3316054166
Nimbus-9B-v2.1-Q4_K_M.gguf Memory-first 5,629,108,576 (5.63 GB) a3db6956cc148f332dd1afdec5ba389efabe02cf73af6cf975866f5557a9d74f
Nimbus-9B-v2.1-Q5_K_M.gguf Quality-first default 6,467,969,376 (6.47 GB) 84c8604a77bcccf850e2a89bf2f3a28d2d846bf11e5f8dbec3094fe31be6e4f6

llama.cpp

Validated release runtime: llama.cpp b10007. Native thinking uses the supplied Qwen/Ornith chat template and DeepSeek-style reasoning parsing.

llama-server --model Nimbus-9B-v2.1-Q5_K_M.gguf --ctx-size 65536 --n-gpu-layers all --reasoning-format deepseek

Evaluation

The released Q5_K_M artifact was evaluated with llama.cpp b10007 on Vulkan, native thinking, one answer per task, temperature 0.6, top-p 0.95, top-k 20, seed 42, and the official network-disabled EvalPlus scorer. The base run allowed 32,768 completion tokens. Each original length-plus-empty nonresponse received exactly one preserved 60,000-token recovery attempt; there was no repeated resampling.

Benchmark Passed Total pass@1
HumanEval 146 164 89.0%
HumanEval+ 135 164 82.3%
MBPP 330 378 87.3%
MBPP+ 277 378 73.3%

Three HumanEval and seven MBPP truncations recovered at the larger limit. Two HumanEval and three MBPP nonresponses remained zero-valued. “Plus” uses EvalPlus' official base-and-plus pass condition.

Nimbus-9B v2.1 EvalPlus results

The adjacent assets/nimbus-9b-v2.1-evalplus.json is the machine-readable source for this chart.

Release landscape

This is a capability and packaging comparison, not a cross-model score claim. Other publishers' benchmarks use different harnesses, prompts, inference budgets, and hardware, so they are not mixed into the Nimbus EvalPlus chart.

Release Parameters Modality Published context Positioning
Nimbus-9B v2.1 9B Multimodal Transformers; text-only GGUF 262,144 validated for this release Local coding/reasoning; BF16, Q4_K_M, Q5_K_M with checksums
Qwen3.5-9B 9B Multimodal 262,144 in current serving guidance Foundation model; reasoning and tool use
Ornith-1.0-9B 9B Multimodal 262,144 in current serving guidance Immediate upstream focused on coding agents
Granite-3.3-8B-Instruct 8B Text 128,000 General instruction, code, function calling, and RAG

Nimbus-9B v2.1 inherits its architecture and foundation capabilities from Qwen3.5 through Ornith. Nimbus' contribution is the post-training, release packaging, quantization, and exact evaluation reported above—not authorship of the foundation model.

Provenance and scope

  • Quantized from Nimbus-Labs/Nimbus-9B-v2.1
  • Foundation: Ornith-1.0-9B on Qwen3.5-9B
  • GGUF files are text-only; the Transformers repository retains the multimodal components.
  • Do not infer memory fit from file size alone; context KV cache and runtime buffers require additional memory.

Licenses and notices

See LICENSES.md, THIRD_PARTY_NOTICES.md, and LICENSES/Apache-2.0.txt.

Project

Nimbus8 · Transformers checkpoint

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