Claude Opus 5

    anthropic/claude-opus-5
    Playground

    Flagship model for demanding reasoning, coding, and long-horizon agentic work, spanning end-to-end software, code review, parallel subagent coordination, visual analysis of charts and documents, and complex office deliverables.

    CodingInstruction FollowingAgent CodingReasoningVisionFrontierAgent
    Modality
    Input / Output Pricing
    $5 / $25M tokens
    Context
    1M
    Release date
    2026-07-25

    Pricing

    SpecificationPrice
    Input$5/ M tokens
    Output$25/ M tokens
    Cache read$0.5/ M tokens
    Cache write$6.25/ M tokens
    Cache write 1h$10/ M tokens

    Quick Start

    Paste and run the sample code below. The Gate.AI API is OpenAI-compatible—most SDKs only need a new base URL. To switch models, change the model ID.

    1

    Get your API key

    Sign in to the Gate.AI console and create a new key under "API Keys". Keep it safe and send it via the Authorization header on every request.

    Create a key in the console
    2

    Make a request

    Send a POST request to the Chat Completions endpoint with a model ID and an array of messages to get a reply.

    POSThttps://api.gate.ai/anthropic/v1/messages
    curl --location "https://api.gate.ai/anthropic/v1/messages" \
  --header "x-api-key: {API_KEY}" \
  --header "anthropic-version: 2023-06-01" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "claude-opus-5",
  "max_tokens": 256,
  "messages": [
    {"role": "user", "content": "Hello"}
  ]
}'
    3

    Handle the response \\& streaming

    By default a full JSON response is returned. Add "stream": true to the request body to receive incremental chunks over SSE.

    POSThttps://api.gate.ai/anthropic/v1/messages
    curl --no-buffer --location "https://api.gate.ai/anthropic/v1/messages" \
  --header "x-api-key: {API_KEY}" \
  --header "anthropic-version: 2023-06-01" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "claude-opus-5",
  "max_tokens": 256,
  "messages": [
    {"role": "user", "content": "Hello"}
  ],
  "stream": true
}'

    Endpoint

    Create messages in Anthropic Messages API format with text, images, tools, and extended thinking.

    POSThttps://api.gate.ai/anthropic/v1/messages
    Field
    Value
    x-api-key
    Gate.AI API key header with the value {API_KEY}
    anthropic-version
    Anthropic protocol version; for example 2023-06-01
    Content-Type
    Request content type, fixed to application/json
    model
    Model ID; the current model is claude-opus-5
    max_tokens
    Maximum number of tokens the model may generate
    messages
    Ordered array of Anthropic messages
    stream
    Whether to return the result as an SSE stream

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