openclaw - 💡(How to fix) Fix [Feature]: supportsAdaptiveThinking should respect custom provider model capabilities [1 participants]

Feature type

Enhancement to adaptive thinking model detection.

Summary

supportsAdaptiveThinking() in @mariozechner/pi-ai/dist/providers/anthropic.js uses a hardcoded model ID allowlist (opus-4-6, opus-4.6, opus-4-7, sonnet-4-6, etc.). Custom providers that proxy Anthropic models under different model IDs (e.g., corporate gateways, load balancers, or API aggregators) cannot benefit from adaptive thinking — even though the underlying model supports it.

This causes:

1. First request sent with thinking.type: "adaptive" + output_config.effort → proxy forwards to real Claude model → works
2. But OpenClaw never sends adaptive thinking params because supportsAdaptiveThinking("custom-model-id") returns false
3. Agent falls back to thinking: "off", degrading response quality

Proposed Solution

Allow custom providers to declare adaptive thinking support via config, e.g.:

{
  "models": {
    "providers": {
      "my-proxy": {
        "baseUrl": "https://proxy.example.com/anthropic",
        "api": "anthropic-messages",
        "models": [
          {
            "id": "my-claude-proxy",
            "name": "my-claude-proxy",
            "capabilities": {
              "adaptiveThinking": true
            }
          }
        ]
      }
    }
  }
}

Then supportsAdaptiveThinking() checks:

1. Config-declared capability (if present) — takes precedence
2. Hardcoded model ID list (existing behavior as fallback)

This is the same pattern used for other model capabilities like reasoning, contextWindow, and maxTokens — they can all be overridden in the provider config.

Workaround

We patch supportsAdaptiveThinking() directly to add our custom model ID prefix:

function supportsAdaptiveThinking(modelId) {
    if (modelId.startsWith("zyb-")) return true;  // custom proxy model
    return (modelId.includes("opus-4-6") || ...);
}

This works but requires re-patching on every OpenClaw upgrade.

Environment

• OpenClaw: 2026.4.25 (aa36ee6)
• Provider: custom anthropic-messages via corporate proxy (model ID: zyb-high, backed by Claude Opus)
• OS: macOS (Darwin 25.4.0)