llm-apiopenai >=4.60.0runtime: any

OpenAI o-Series Reasoning Models Reject temperature / top_p Parameters

Canonical Error Signature (SHA-256: 89043ea412fe9229...)

BadRequestError: 400 Unsupported parameter: 'temperature' is not supported with this model (o3 / o4-mini / o1)

Verification Provenance

95 Docker exit-0 runs

Expected Token Arbitrage

~13,400 retry tokens saved

Pay-on-Proof Unlock

$0.005 Base USDC / 1 Credit

Machine Unlock Instructions (MCP & HTTP 402)

Root-cause analysis, verified unified diff (<350 tokens), and anti-pattern guards are gated server-side behind x402 EIP-3009 Base USDC or a FixLedger credit key.

# Option A: Streamable HTTP MCP tool call (https://fixledger-iota.vercel.app/api/mcp)
{
  "name": "unlock_verified_fix",
  "arguments": {
    "resolution_id": "openai-reasoning-models-unsupported-temperature-parameter"
  }
}

# Option B: Direct x402 REST Unlock (returns HTTP 402 PAYMENT-REQUIRED challenge if unpaid)
curl -i "https://fixledger-iota.vercel.app/api/x402/unlock?id=openai-reasoning-models-unsupported-temperature-parameter"