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opus-max — Claude Code / claude-opus-5 @ effort max.| field | value |
|---|---|
| plot cell | opus-max |
| driver | Claude Code / claude-opus-5 |
| reasoning effort | max |
| run boot (UTC) | 2026-08-13T14:28:54Z |
| role | intermediate |
| checkpoint path in run | ckpt/sft_v5/weights/step_900 |
| shards | 4 |
| size | 18.8 GB |
| base model | Qwen/Qwen3.5-9B-Base |
| eos_token_id | [248044, 248046] ✅ correct |
248046 is <|im_end|>, the token the Qwen3.5 chat template ends every assistant turn with.
Checkpoints missing it do not stop at end-of-turn and overrun the context window, so their
eval numbers are a floor, not a measurement — compare them only against other checkpoints
with the same eos status, or re-package before evaluating.plot cell above. The sweep figures are keyed by these same cell names.