harnesses-and-models
Installation
SKILL.md
Harnesses and models
Every run executes on a harness · model combo: the harness is the coding agent (the product being measured is used through it), the model is the LLM inside it. The same prompt can behave very differently across combos, so knowing which combo produced a run is load-bearing for any comparison.
The registry
The only combos the queue accepts:
| Harness | Models |
|---|---|
claude-code |
claude-opus-5-5 (Opus 5.5), claude-opus-5 (Opus 5), claude-opus-4-8 (Opus 4.8), claude-opus-4-6 (Opus 4.6), claude-sonnet-4-6 (Sonnet 4.6), claude-sonnet-5-5 (Sonnet 5.5), claude-sonnet-5 (Sonnet 5), claude-haiku-5-5 (Haiku 5.5), claude-haiku-4-5-20251001 (Haiku 4.5), claude-fable-5-1 (Fable 5.1), claude-fable-5 (Fable 5) |
codex |
openai/gpt-5.5 (GPT-5.5), openai/gpt-5.6 (GPT-5.6), openai/gpt-5.6-sol (GPT-5.6 Sol), openai/gpt-5.6-terra (GPT-5.6 Terra), openai/gpt-5.6-luna (GPT-5.6 Luna) |
opencode |
openai/gpt-5.5 (GPT-5.5), openai/gpt-5.6 (GPT-5.6), anthropic/claude-opus-4-8 (Opus 4.8), anthropic/claude-opus-4-6 (Opus 4.6), xai/grok-4.3 (Grok 4.3), xai/grok-4.5 (Grok 4.5), xai/grok-4.6 (Grok 4.6), xai/grok-4.7 (Grok 4.7) |
openclaw |
openai/gpt-5.5 (GPT-5.5), openai/gpt-5.6 (GPT-5.6) |
cursor-cli |
cursor/auto (Auto) |
fx |
vercel_ai_gateway/anthropic/claude-sonnet-4.5 (Sonnet 4.5), vercel_ai_gateway/anthropic/claude-opus-4.6 (Opus 4.6) |
v0 |
v0/v0-mini (v0 Mini), v0/v0-pro (v0 Pro), v0/v0-max (v0 Max) |
grok-build |
grok-build-0.1 (Grok Build 0.1) |
Default when nothing is pinned: claude-code + claude-opus-4-8.