Claude Sonnet 5.5 (claude-sonnet-5-5) is a chat model from anthropic with a 1M-token context window; proprietary (API-only); capabilities tools, vision, reasoning; input image, pdf, text; output text.
1MContext
128KMax output
$2$ / 1M in
54.5Intelligence
139.27tok / s
Pricing
Input
$2 / 1M tokens
Output
$10 / 1M tokens
Currency
USD
Note
Indicative US list price — verify with the vendor.
Indicative US list price — a reference only, verify with the vendor. Source: litellm. Last verified 2026-10-30.
Benchmarks
Intelligence index
54.5
Cited from a public third-party leaderboard — a reference, verify at the source. Source: Artificial Analysis. Last verified 2026-11-05.
Performance
Throughput
139.27 tokens/s
Latency (TTFT)
389.26 s
Cited speed metrics — a reference, verify at the source. Source: Artificial Analysis. Last verified 2026-11-05.