Claude Opus 4.5 API

Model details

Context window

200K tokens

Max output

32K tokens

Input

Text, images

Output

Text

Capabilities

Reasoning, Vision, Tool calling, Streaming

Interfaces

OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses

Why teams pick it

• Claude Opus 4.5 for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.

Call Claude Opus 4.5

Claude Opus 4.5 answers on any of the APIs below — pick the one your code already speaks and just swap in your Inferray key.

curl https://api.inferray.com/v1/chat/completions \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "claude-opus-4-5-20251101",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/messages \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "claude-opus-4-5-20251101",
  "max_tokens": 1024,
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ]
}'

curl https://api.inferray.com/v1/responses \
  -H "Authorization: Bearer inferray_..." \
  -H "Content-Type: application/json" \
  -d '{
  "model": "claude-opus-4-5-20251101",
  "input": "Hello"
}'

Use Claude Opus 4.5 in your tools

Every coding agent below has a setup guide. Set the model to claude-opus-4-5-20251101.

• Claude Code
• Codex
• opencode
• Cline
• Roo Code
• Aider
• Continue

More from Anthropic

Alternatives to Claude Opus 4.5

• Kimi K3 FastKimi K3 Fast for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.Moonshot AI
• GPT-5.5A new class of intelligence for coding and professional work.OpenAI
• Fugu UltraFugu Ultra for OpenAI-style Chat Completions, Anthropic-style Messages, OpenAI-style Responses.Sakana AI

Questions about this model

How much does the Claude Opus 4.5 API cost?

Claude Opus 4.5 costs $5 per 1M input tokens and $25 per 1M output tokens on Inferray, and cached input is $0.5 per 1M. That is the list price, with no gateway fee on top.

Is there a free tier for Claude Opus 4.5?

No. You add credit and pay Claude Opus 4.5's list rate for each request — seats, projects, and API keys are free, and pay-as-you-go credit never expires.

Am I charged for failed requests?

No. A request that fails without returning a result is not billed. If a response fails part-way, the tokens already processed before the failure are charged.

Is Claude Opus 4.5 included in Token Plans?

No. Claude Opus 4.5 is pay-as-you-go only; Token Plans cover the other text models in the catalog.

Can I use Claude Opus 4.5 in Claude Code?

Yes. Set ANTHROPIC_BASE_URL to https://api.inferray.com, ANTHROPIC_AUTH_TOKEN to your Inferray key, and ANTHROPIC_MODEL to claude-opus-4-5-20251101. The same key works in Codex, opencode, Cline, and other agents.

Does Claude Opus 4.5 support tool calling and vision?

Claude Opus 4.5 supports tool calling, image input, reasoning and streaming on Inferray.

Is it the real Claude Opus 4.5?

Yes. A request for claude-opus-4-5-20251101 is answered by Claude Opus 4.5 from Anthropic, billed at its published list price. Inferray never substitutes a different or smaller model.