AgentPTB checkpoint index

Every checkpoint produced by the AgentPTB driver × reasoning-effort sweep, one HF repo each. All are Qwen/Qwen3.5-9B-Base derivatives in standard safetensors format.

Model id format

agentic-ptb/{cell}.h{HHH}.{family}.{step}

hHHH is the hour of that cell's 100-hour run at which the checkpoint was written — the same x-axis the sweep figures use for eval panels. A checkpoint therefore drops straight onto the performance-over-time curve, and sorting ids within a cell sorts them chronologically. hNA means the hour could not be recovered (see hour_source).

{cell} is the plot key, so results join back to the figures directly.

Cells

cell	driver	effort	checkpoints
sol-high	Codex / gpt-5.6-sol	high	57
grok	pi / grok-4.6	xhigh	59
dpsk-v4-flash	pi / DeepSeek v4-flash	thinking	40
kimi	kimi-code / kimi-k3	high	38
opus-max	Claude Code / claude-opus-5	max	13
sol-max	Codex / gpt-5.6-sol	max	13
opus-high-v1	Claude Code / claude-opus-5	high	3
sol-max-opusnode	Codex / gpt-5.6-sol	max	9
sol-max-v2	Codex / gpt-5.6-sol	max	2 (run still live)

opus-high-v1 is the original opus@high; a rerun (v2) is in flight. sol-max-opusnode is an extra attempt, not one of the 7 plotted cells.

Fields

manifest.json / manifest.csv, one row per repo:

field	meaning
model_id	full HF id
cell, driver, effort	which run produced it
hour	hours into the 100-hour run — the plot x-axis
hour_source	how the hour was determined — see below
hour_upper_bound	for untimed rows: latest known hour in the same family
driver_tokens_at_hour	cumulative driver tokens at that moment — the cost axis
role	SUBMITTED / fallback / intermediate
eos_ok, eos_token_id	packaging correctness — read this before comparing
source	original path in the run, or the msr-spare repo recovered from

hour_source

value	n	meaning
mtime	188	checkpoint dir mtime on the PVC (exact)
janitor	24	archive timestamps from the arm's ckpt-janitor.log (exact)
extrapolated	7	that family's own step→time cadence; validated against independent local anchors to within ~1.4 h
unrecoverable	15	local copy pruned, no timing record survives. hour is null — use hour_upper_bound and step order, or exclude

Before you compare two checkpoints

Check eos_ok. 248046 is <|im_end|>, which the Qwen3.5 chat template ends every assistant turn with. A checkpoint missing it does not stop at end-of-turn and overruns the context window, so its score is a floor, not a measurement. This is a packaging artifact, not a capability difference, and it is not uniform across cells — grok is 0/59 correct while sol-high is 39/57. Comparing across that boundary measures packaging.

Cost per point of gain

cost_per_point = row["driver_tokens_at_hour"] / (score - baseline_score)

Both axes come from this manifest. Restrict to eos_ok rows, or the packaging artifact will read as poor cost-efficiency.