Current reasoning model
Anthropic - Claude Fable - 5.1 (max)
Claude Fable 5.1 max still leads this snapshot at Intelligence Index 53 with 1M context. First-chunk latency remains very high; AA scores are not comparable 1:1 with the previous snapshot.
Best for: Highest-effort Claude Fable work when Intelligence Index matters more than wait time.
Anthropic
- Context
- 1M
- AA Index
- 53
- Cost per task
- $7.63
- Speed
- 66 tok/s
- First chunk
- 234.98s
- Total response
- 242.56s