643c0a88f1
OpenAI gating was per-provider — the restrictive reasoning-class capability
applied to gpt-4o too, even though gpt-4o on /v1/responses still accepts
temperature / top_p / seed / frequency_penalty / presence_penalty. Anthropic
4.7 was the inverse: backend stripped temperature / top_p / top_k per-model
but the UI still showed the sliders, so moving a knob silently did nothing.
Split openai capabilities into OPENAI_REASONING_CAPABILITIES (current
restrictive set, used for gpt-5.x / o1 / o3 / o4) and OPENAI_CHAT_CAPABILITIES
(full sampling minus top_k and stop, used for gpt-4o and any non-reasoning id
from the registry). Mirror the backend _ANTHROPIC_4_7_SAMPLING_REMOVED regex
on the frontend so claude-(opus|sonnet|haiku)-4-7 hides temperature / top_p /
top_k in the panel instead of relying on backend strip. getProviderCapabilities
now takes an optional modelId so chat-settings-sheet and chat-adapter both
resolve the same per-model variant; no behavior change for unspecified modelId.
Verified live OpenAI / Anthropic docs:
- GPT-5 temperature must equal 1: platform.openai.com/docs/guides/reasoning,
community.openai.com/t/temperature-in-gpt-5-models/1337133
- GPT-4o accepts full sampling on Responses: docs.aimlapi.com gpt-4o ref,
OpenAI cookbook seed example
- Claude 4.7 sampling removed (400 on any non-default temperature/top_p/
top_k): platform.claude.com/docs/en/about-claude/models/whats-new-claude-4-7
160 backend routing tests still pass; frontend tsc clean.
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