Unverified50% confidenceFactExact time
In Claude 4.7 and later versions, passing a non-default value for temperature, top_p, or top_k produces an HTTP 400 error.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
10/18/2026
First Seen
Valid until: 11/1/2026
Sources
Related Entities
Related Claims
UnverifiedHaiku 5.5 does not accept temperature 0, any value other than 1 returns a 400 error, and setting top_k likewise errors.64% similarUnverifiedIn the first run, Claude Opus 5 scored only 0.08 and GPT-5.5 errored out entirely; upon investigation this was found to be a 403 PermissionDeniedError quota-exceeded error, where concurrent requests burned through the quota for expensive models and the scorer incorrectly treated errored calls as wrong answers.55% similarUnverifiedClaude Code's recovery limit for max_tokens errors is three attempts, with the constant named MAX_OUTPUT_TOKENS_RECOVERY_LIMIT = 3.50% similarUnverifiedWith temperature 1.3 combined with the default top-p 0.9, the SynthID flagging rate dropped from 25% to 14%, the paired z change was -0.48, and there was no significant difference in meaning (4.11 vs 4.19) or fluency (4.93 vs 4.95).50% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1062608API
curl https://kongchang.com/api/v1/knowledge/claims/1062608MCP
get_claim(id=1062608)