Claude Opus 5.5.
Claude Opus 5.5 is Anthropic's current Opus model for long-running agentic coding and knowledge work, with text and image input, a 1M-token context and always-on thinking.
No self-host path — closed weights.
Claude Opus 5.5's weights aren't published. Use it via the access providers below.
Cheapest hosted endpoints.
Variants in the Claude family.
Claude Opus 4.7
Frontier reasoning and long-form coding from Anthropic.
Claude Sonnet 4.6
Best price-performance from Anthropic. Default for production agents.
Claude 3.5 Sonnet
Anthropic's 3.5 generation — still in active production.
Claude Fable 5.1
Claude Fable 5.1 improves on Claude Fable 5 across the board, with the bigges...
Claude Haiku 4.5
Fast, cheap Claude variant for high-throughput inference.
Claude 3.5 Haiku
Anthropic's fast Claude 3.5 model, with no downloadable weights, built for lo...
Claude Opus 5
Claude Opus 5 is Anthropic's legacy July 2026 model with text and image input...
Claude Sonnet 5
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier perfor...
Claude Fable 5
Claude Fable 5 is Anthropic's legacy Fable model for long-horizon and agentic...
Claude Opus 4.8
Claude Opus 4.8 is a legacy Anthropic model with text and image input and a 1...
Claude 3 Haiku
Claude 3 Haiku is Anthropic's fastest and most compact model for near-instant...
Claude Opus 4
Claude Opus 4 is benchmarked as the world’s best coding model, at time of rel...
Claude Opus 4.1
Claude Opus 4.1 is Anthropic's August 2025 upgrade to Opus 4 for coding, agen...
Claude Opus 4.5
Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex...
Claude Opus 4.6
Claude Opus 4.6 is Anthropic's legacy Opus model with text and image input, a...
Claude Sonnet 4
Claude Sonnet 4 significantly enhances the capabilities of its predecessor, S...
Claude Sonnet 4.5
Claude Sonnet 4.5 is a deprecated Anthropic model with text and image input a...
Claude Haiku 5.5
Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensi...
Claude Sonnet 5.5
Claude Sonnet 5.5 is Anthropic's model for everyday coding, agents and enterp...
What it costs per month across providers.
Estimate your monthly bill for Claude Opus 5.5 across every host that publishes per-token pricing. Slide your token volumes; the chart + table re-rank cheapest-first.
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About Claude Opus 5.5.
Claude Opus 5.5 is Anthropic's current Opus model, released September 22, 2026, and built for long-running agentic coding and knowledge work. Anthropic's typical uses are multihour autonomous coding agents, large refactors, systems engineering, vision-heavy workflows and computer use. It takes text and images and returns text, with a 1M-token context and 128K tokens of output, or up to 300K through the Batch API in beta. Adaptive thinking is always on and can't be turned off, and effort sets its depth.