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Anthropic: claude-opus-4-8-thinking

claude-opus-4-8-thinking
1M context128K outReasoningToolsVisionFilesCacheStructuredComputer use
Released May 27, 2026Knowledge cutoff Nov 2025Updated Jun 25, 2026

Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token context window. It is suited for highly autonomous agents, long-horizon agentic work, knowledge work, and memory-driven tasks where coherence over extended sessions matters. It is particularly strong on multi-step reasoning, complex coding, and end-to-end project orchestration - large codebases, multi-stage debugging, and long-running asynchronous agent pipelines. Beyond coding, it handles knowledge work such as drafting documents, building presentations, and analyzing data, maintaining quality across very long outputs.

Mode chatTokenizer ClaudeReasoning levels maxModerated

Pricing

Input price
$3.15/ 1M tokens$5.0037% off
Output price
$15.75/ 1M tokens$25.0037% off
Compatible endpoints anthropic, openaiVendor Anthropic

Uptime

Performance

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Usage & Ranking

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Supported parameters

All providers = every upstream serving this model supports it. Some providers = depends on which upstream handles the request. Default = the value sent when you leave the parameter unset.

ParameterProvidersDefault
include_reasoningAll providers-
max_completion_tokensSome providers-
max_tokensAll providers-
reasoningAll providers-
reasoning_effortAll providers-
response_formatAll providers-
stopAll providers-
structured_outputsAll providers-
temperatureSome providers-
tool_choiceAll providers-
toolsAll providers-
verbosityAll providers-

Frequently asked questions

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