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Claude Opus 5
anthropic/claude-opus-5
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Anthropic · Model guide

Claude Opus 5

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anthropic/claude-opus-5

The fifth-generation Opus, and Anthropic's everyday frontier model for agentic coding, knowledge work, computer use and long-running tasks. Effort runs across five levels, and at the top two thinking can no longer be switched off. Anthropic reports it behind Mythos 5 on cybersecurity work.

Modalities
TextImageText
Context
1M
Max output
128K
Price / 1M tokens
$ 5.00in$ 25.00out
StreamingTool callingJSON outputImage inputThinking mode · can be turned off

What this model is good at

What the vendor positions it for, and which of our models to reach for instead.

VendorFor complex agentic coding and enterprise work.source

Best for

  • Agentic coding · Anthropic reports it state of the art on its Frontier-Bench coding evaluation.(vendor claim)source

  • Professional knowledge work · Anthropic reports it state of the art on GDPval-AA.(vendor claim)source

  • Scientific research · Anthropic reports gains over Opus 4.8 on every one of its life sciences evaluations.(vendor claim)source

Neighbouring models
Compare them side by side →

Pricing and billing

Billed per token. Cached input is charged at the cache-read rate.

Price / 1M tokensYou pay
Input$ 5.00
Output$ 25.00
Cache read$ 0.50
Cache write$ 6.25
Estimate a request
$ 0.1000
Estimated cost per request
10.0K × $ 5.00
+ 2.0K × $ 25.00
≈ $ 100.00 per 1,000 requests

Capabilities and limits

What CrossModel guarantees across every route this model can take right now.

Context window
1.0M tokens
Max output
128.0K tokens
Input / output modalities
Text + Image → Text
Streaming
Supported
Tool calling
Supported
Structured output (JSON)
Supported
Image input
Supported
Thinking mode
Supported· can be turned off
Reasoning effort
low · medium · high · xhigh · max
Available endpoints
/v1/chat/completions · /v1/responses · /v1/messages
First-party sources:Specsplatform.claude.comCapabilitiesplatform.claude.com 1platform.claude.com 2platform.claude.com 3platform.claude.com 4
Conditional limitsDisclosed by the vendor. These do not make the capability unavailable — they say when it is not.
  • reasoning.toggle is unavailable when Reasoning effort=xhigh,max source

Published benchmarks

Scores the vendor reported, with the evaluation setup each one came from.

Agentic coding
  • Frontier-Bench v0.1
    score·Anthropic · 2026-07-24setup not fully disclosed

    Anthropic's footnote for the accompanying effort plot describes an internal run on the mini-SWE-agent harness with a GKE backend, mean reward over five attempts per task, with Opus 4.8 as the safety-classifier fallback.

    43.3%
  • FrontierCode v1.1 (Main)
    score·Anthropic · 2026-07-24setup not fully disclosed
    53.4%
Agentic search
  • BrowseComp (with tools)
    accuracy·Anthropic · 2026-07-24setup not fully disclosed
    90.8%
Agentic work
  • AutomationBench
    score·Anthropic · 2026-07-24setup not fully disclosed

    Zapier's business-workflow evaluation, reported by Anthropic.

    26%
Computer use
  • OSWorld 2.0
    success_rate·Anthropic · 2026-07-24setup not fully disclosed
    70.6%
Knowledge work
  • GDPval-AA v2
    elo·Anthropic · 2026-07-24setup not fully disclosed
    1861
Reasoning
  • ARC-AGI-3
    score·Anthropic · 2026-07-24setup not fully disclosed
    30.2%
  • Humanity's Last Exam
    accuracy·Anthropic · 2026-07-24setup not fully disclosed

    No tools.

    56.3%
  • Humanity's Last Exam (with tools)
    accuracy·Anthropic · 2026-07-24setup not fully disclosed

    Anthropic does not disclose which tools the run had.

    64.7%

Vendor-reported numbers, not CrossModel measurements. Scores are only comparable when the benchmark version, metric and evaluation setup match, so nothing here is averaged or ranked.

Use it in your tools

Point the base URL at CrossModel and paste this model ID — every tool below has a setup guide.

Claude Code
Anthropic's official command-line coding assistant
Cursor
AI-first code editor
Cline
Open-source AI coding agent for VS Code
Codex
OpenAI's coding agent for ChatGPT desktop and the terminal
OpenCode
Open-source terminal coding assistant
Zed
High-performance, AI-native code editor
Open WebUI
Open-source, self-hosted AI chat interface
Continue
Open-source AI coding assistant for VS Code & JetBrains
See all integration guides →

Frequently asked questions

What is Claude Opus 5?
Claude Opus 5 is available on CrossModel as anthropic/claude-opus-5. It has a 1M-token context window and can return up to 128K tokens per request.
How much does Claude Opus 5 cost?
Currently $ 5.00 per 1M input tokens and $ 25.00 per 1M output tokens. Cached input is billed at $ 0.50 per 1M.
Does Claude Opus 5 support tool calling and structured output?
Tool calling: Supported · Structured output (JSON): Supported · Image input: Supported · Streaming: Supported · Thinking mode: Supported
Which endpoint do I call?
OpenAI Chat Completions (/v1/chat/completions), OpenAI Responses (/v1/responses) and Anthropic Messages (/v1/messages) all work — pick whichever your SDK already speaks.
Can I try it without writing code?
Yes. Sign in and open the Playground on this page to chat with the model directly — no API key needed. Usage is billed from your wallet at the normal rate.

Chat first, integrate later

Chat first, then wire it in once you like the answers.