Claude Sonnet 5.5

AnthropicProprietary1M context

Claude Sonnet 5.5 is a proprietary model from Anthropic with a 1M-token context window. 4 providers list it, from $2.00 per million input tokens and $10.00 per million output tokens (Anthropic and 2 others).

Maker
Anthropic
Licence
Proprietary
Context window
1M
Providers listed
4
Lowest input, per 1M
$2.00
Lowest output, per 1M
$10.00
Anthropic's own API, per 1M
$2.00 in · $10.00 out
Effort settings
Medium, Max

Providers serving Claude Sonnet 5.5

Cheapest first, by the blended rate of three input tokens to one output token. Prices in US dollars per million tokens, as of 26 Oct 2026.

ProviderInputOutputContextToolsJSON modeOpenAI-compatibleModel ID
Anthropic
$2.00$10.001MYesYesNoclaude-sonnet-5-5
Google Vertex
$2.00$10.001MYesYesNoclaude-sonnet-5-5@default
Microsoft Azure
$2.00$10.001MYesYesNoclaude-sonnet-5-5
Amazon Bedrock
$2.20$11.001MYesYesNoanthropic.claude-sonnet-5-5

Benchmark scores

Published scores only, each linked to its source. Compare every model in Bench rankings

BenchmarkMediumMax
APEX-Agents
Agentic office work
44.6%75.5%
GPQA Diamond
PhD-level scientific reasoning
—95.6%
Humanity's Last Exam
Reasoning & knowledge
—56.9%v

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