Qwen3.5-4B-TMax-CISPO

Qwen3.5-4B fine-tuned with CISPO (Clipped IS-weight Policy Optimization) on the TMax-15K terminal-agent RL environment, using a fully-asynchronous rollout/trainer setup (verl).

Training

  • Base model: Qwen/Qwen3.5-4B
  • Algorithm: CISPO (rollout-anchored), clip high 0.28 / low 10
  • Sampling: temperature 1.0, top_p 1.0, group size 16
  • Data: TMax-15K, text-only short/moderate complexity split (AppTainer-compatible allowlist)
  • Agent: terminal_echo_tool_agent (Terminus-2 command interface)
  • Precision: fp32 generation/LM head + fused chunked cross-entropy
  • Exported from trainer checkpoint (global_step 51).

Intended use

Research checkpoint for terminal/agentic RL. Not instruction-tuned for general chat.

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