Expired50% confidenceFactExact time
The previous-generation Opus 4.6 Fast will be gradually phased out, and GitHub recommends that users migrate to Opus 4.8 Fast.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/6/2026
First Seen
Valid until: 10/4/2026(expired)
Sources
Related Claims
UnverifiedFast Mode is priced lower than the previous generation, but still higher than the standard Opus 4.863% similarUnverifiedThe user has long used the Fable and Opus 4.8 (Max) version models.63% similarUnverifiedFast Mode delivers noticeably faster token output speed while maintaining the same level of intelligence as Opus 4.8, making it better suited for interactive coding and Agent workflow scenarios.61% similarUnverifiedxAI's latest Grok 4.5 has become more token-efficient, meaning it completes the same tasks using fewer tokens.57% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/114052API
curl https://kongchang.com/api/v1/knowledge/claims/114052MCP
get_claim(id=114052)