Models / Claude Opus 5ID: anthropic/claude-opus-5
chat model by Anthropic

Claude Opus 5

Claude Opus 5 is a multimodal foundation model supporting text and image inputs with a 1,000,000-token context window and 128,000 max output tokens. It has a May 2026 knowledge cutoff for multi-stage software engineering.

PlaygroundQuick Start
Context window1M
Max output128K
Maker

Anthropic

Served On

Anthropic

Specifications

Context window, ranked against other chat models

Proportional scale: 0 to 1M tokens. Not ranked, no published context window: glm-5.3-prime, qwen3-235b-a22b-2507, qwen3.7-max-2026-05-17, llama4-maverick-17b-instruct.

Context window

1.0M

tokens
Max output

128K

tokens
Modality

chat

Vision
Function calling
System prompt

Benchmarks & Performance Rankings

Empirical intelligence benchmarks and category leaderboard placements for Claude Opus 5.

Compare in BenchmarksLeaderboard
Leaderboard Placements
#7
agentScore: 98.1%
#4
overallScore: 99.2%
Recommended by nRouter Smart Routing: High-stakes security audits and planning agents. Key operational strength: Leading recovery (13.27%) and sovereign parameter depth.

Pricing

Rates are read live

Pricing for claude-opus-5 is fetched from the live catalogue on load, so it is never served from a cache that could outlive a repricing.

Provider-Reported Capabilities

What the hosting provider reports for this model, shown as it was returned. nRouter adds nothing to this report and infers nothing that is missing from it.

Batch batch
Effort effort
Low low
Max max
High high
Xhigh xhigh
Medium medium
Thinking thinking
Types types
Enabled enabled
Adaptive adaptive
Disabled disabled
Citations citations
PDF input pdf_input
Image input image_input
Code execution code_execution
Context management context_management
Compact (2026-01-12) compact_20260112
Clear thinking (2025-10-15) clear_thinking_20251015
Clear tool uses (2025-09-19) clear_tool_uses_20250919
Structured outputs structured_outputs

Availability

Not enough data yet

We have not collected enough health probes for this model to publish an uptime or latency figure. A percentage from a handful of samples is fabricated precision, so none is shown until the sample count supports one.

How Claude Opus 5 is billed

Billed at the provider's list price, with no per-token markup.

Exact list price
Tokens settle at the published rate of the model that served your call.
Cache discounts passed through
Provider prompt-caching discounts reach your balance with no added fee.
Cost on every response
Each response carries the x-nr-request-cost header, so you can reconcile spend per request.

More from Anthropic

claude-opus-5-5claude-fable-5-1claude-opus-4-5-20251101claude-fable-5

Start building with claude-opus-5

One API key, three steps. Choose your tool to begin.

  1. Get a key

    Create API key

  2. Set your API key

    export NROUTER_API_KEY="<YOUR_API_KEY>"

  3. Configure Claude Code

    Choose a tool, then copy its setup from the panel.

npm install -g @anthropic-ai/claude-code
Claude Code · anthropic/claude-opus-5
# Point Claude Code to nRouter gateway
export ANTHROPIC_BASE_URL="https://api.nrouter.ai"
export ANTHROPIC_API_KEY="$NROUTER_API_KEY"

# Launch with anthropic/claude-opus-5
claude --model anthropic/claude-opus-5

Frequently asked questions

What is Claude Opus 5?

Claude Opus 5 is a multimodal foundation model supporting text and image inputs with a 1,000,000-token context window and 128,000 max output tokens. It has a May 2026 knowledge cutoff for multi-stage software engineering.

How much does Claude Opus 5 cost?

Claude Opus 5 is billed at the provider's list price on nRouter with no per-token markup — tokens settle at the exact upstream rate. Input and output rates are read live, so see the pricing section above for the current figures.

What is the context length of Claude Opus 5?

Claude Opus 5 supports a 1,000,000-token context window. It can generate up to 128,000 output tokens per request.

Does Claude Opus 5 support tool calling and structured outputs?

Yes. Claude Opus 5 supports tool calling (function calling), so it can invoke external tools and APIs during a conversation.

What inputs and outputs does Claude Opus 5 support?

Claude Opus 5 takes text and images as input and returns text as output.

How do I use Claude Opus 5 via nRouter?

Use any OpenAI-compatible client: point it at https://api.nrouter.ai/v1 with your nRouter API key and set the model to "anthropic/claude-opus-5". The quick-start panel above has a copy-paste curl command for this model.

When was Claude Opus 5 released?

Claude Opus 5 was released on July 24, 2026.

Where is the Claude Opus 5 documentation?

Start at nrouter.ai/docs. The quick-start guide (nrouter.ai/docs/getting-started/quick-start) covers API keys and your first request, and the API reference (nrouter.ai/docs/api-reference) lists every parameter.

What other text models does Anthropic have?

Other Anthropic text models on nRouter include Claude Opus 5.5 (nrouter.ai/models/claude-opus-5-5), Claude Fable 5.1 (nrouter.ai/models/claude-fable-5-1), Claude Opus 4.5 (nrouter.ai/models/claude-opus-4-5-20251101), Claude Fable 5 (nrouter.ai/models/claude-fable-5).

Pricing is live — see above for current rates.