Claude Opus 4.6

Model and endpoint

Use claude-opus-4-6 with POST https://api.toklab.ai/v1/messages. Keep your TokLab API key on the server.

This reference covers the core text-generation request. Optional reasoning, tool and sampling controls depend on the model and selected route; do not assume that settings from another model version are interchangeable.

Quick example

curl https://api.toklab.ai/v1/messages \
  -H "x-api-key: $TOKLAB_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{"model": "claude-opus-4-6", "max_tokens": 1024, "messages": [{"role": "user", "content": "Explain optimistic concurrency in three bullet points."}]}'

Python

import os
import anthropic

client = anthropic.Anthropic(
    api_key=os.environ["TOKLAB_API_KEY"],
    base_url="https://api.toklab.ai",
)
response = client.messages.create(
    model="claude-opus-4-6",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Explain optimistic concurrency."}],
)
print("".join(block.text for block in response.content if block.type == "text"))

Request parameters

Omit optional controls to use the upstream defaults. Token budgets must fit the selected model's context and output limits; this reference does not advertise unverified limits.

Response and streaming

The JSON response contains id, model, content, stop_reason, and usage. Read text blocks from content where type is text.

Set stream: true and add -N to cURL to consume the event stream. For streaming, handle message_start, content_block_delta, message_delta, and message_stop events. Text deltas are carried in delta.text. A closed connection alone does not establish a successful response.

Chat Completions compatibility

The shared gateway also accepts POST /v1/chat/completions with Bearer authentication:

{
  "model": "claude-opus-4-6",
  "messages": [
    {
      "role": "user",
      "content": "Explain optimistic concurrency."
    }
  ]
}

Read the answer from choices[0].message.content; streamed deltas appear in choices[0].delta.content. Use the native endpoint above for provider-specific features.

Pricing and route selection

TokLab reads prices from the shared gateway. Input, output, cache usage and any context-length tiers are listed in Current rates below; all amounts are USD. The catalogue's starting price is the input rate per million tokens, not the total request cost.

Discover the calling IDs available to your key:

curl https://api.toklab.ai/v1/models \
  -H "Authorization: Bearer $TOKLAB_API_KEY"

Use an exact ID returned by discovery. A listed model:group ID selects that group's rates and requires access to that group. Public pricing alone does not guarantee that every key can call a route.

Errors

Check the HTTP status and response body before reading the output. Authentication failures return 401; access or permission failures may return 403; malformed or unsupported parameters return a 4xx response; rate limits return 429. Retry transient errors with backoff, and avoid automatically resubmitting an interrupted request whose outcome is unknown. See the shared error reference.

Related

• Browse models
• Pricing
• Download OpenAPI
• Copyable Markdown