Claude Sonnet 5.5
active
Anthropic2026-09-28
Specifications
Modalities
text
image
Context Window1000K tokens
Max Output128K tokens
Training Cutoff2026-06-01
Open SourceNo
Pricing (per 1M tokens)
Input$2.0000
Output$10.0000
Cache Read$0.1000
Benchmarks
Arena score (text)1477
Arena ratings: LMArena leaderboard dataset, CC BY 4.0, snapshot 2026-10-28.
MMLU-Pro-
SWE-Bench-
GPQA Diamond-
HumanEval-
ARC-AGI-
MATH-
API
Model ID
claude-sonnet-5-5Sources
- Anthropic: Introducing Claude Sonnet 5.5
release date · as of 2026-09-28
- Anthropic: Models overview
model id, context window, max output, training cutoff · as of 2026-11-02
- Anthropic: Pricing
price input, price output, price cache read, price cache write · as of 2026-11-02
- LMArena: Arena leaderboard dataset, text_style_control overall: Claude Sonnet 5.5 (xHigh)
elo rating · as of 2026-10-28