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claude-opus-4-5-20251101 API pricing & access

claude-opus-4-5-20251101 API pricing: $5 per 1M tokens. claude-opus-4-5-20251101. Supports text, image input and text output. Listed specification…

claude-opus-4-5-20251101 API access

claude-opus-4-5-20251101. Supports text, image input and text output. Listed specifications follow public vendor documentation. Available features and limits depend on the selected serving channel.

Compare supported API endpoints and capabilities, then access claude-opus-4-5-20251101 through the unified API gateway.

Category: text
Context length: 200000 tokens
Maximum output: 64000 tokens
Supported APIs: Anthropic Messages API, OpenAI Chat Completions API
API endpoints: POST /v1/messages, POST /v1/chat/completions
Input modalities: text, image
Output modalities: text
Capabilities: vision, reasoning

claude-opus-4-5-20251101 API pricing

Base input price: $5 per 1M tokens
Base output price: $25 per 1M tokens

Base prices are shown in USD before group-specific adjustments. Open the live pricing page for current access-group prices.

About claude-opus-4-5-20251101

claude-opus-4-5-20251101 is the pinned Opus 4.5 snapshot with text and image input and text output. It remains active legacy with a documented 200K context window and 64K output limit for existing version-specific applications.

This version uses extended thinking rather than the later adaptive configuration. Official lifecycle commitments and route availability are separate; preserve snapshot regression cases and review a migration plan for long-lived applications.

Official reference, checked 2026-10-14.

Use cases and prompting

Select relevant passages for long documents and reserve space for the answer and thinking.
Keep the exact snapshot ID and record the returned model to avoid mixing aliases in comparisons.
Retest thinking budgets, tool-message history and structured-data parsing before upgrading.
Compare the same test cases with claude-opus-5-5; check request and response formats in the API documentation.

How to call claude-opus-4-5-20251101

claude-opus-4-5-20251101 is served through tbuy's unified gateway. Existing OpenAI or Anthropic SDK code keeps working: point base_url at https://modelsok.com and use your tbuy API key.

curl (OpenAI-compatible)

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

Python (openai SDK)

from openai import OpenAI

client = OpenAI(base_url="https://modelsok.com/v1", api_key="YOUR_API_KEY")
response = client.chat.completions.create(
    model="claude-opus-4-5-20251101",
    messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)

Python (anthropic SDK)

from anthropic import Anthropic

client = Anthropic(base_url="https://modelsok.com", api_key="YOUR_API_KEY")
message = client.messages.create(
    model="claude-opus-4-5-20251101",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}],
)
print(message.content[0].text)

Frequently asked questions about claude-opus-4-5-20251101

What is claude-opus-4-5-20251101?

claude-opus-4-5-20251101. Supports text, image input and text output. Listed specifications follow public vendor documentation. Available features and limits depend on the selected serving channel.

How do I call claude-opus-4-5-20251101?

Create an API key with access to claude-opus-4-5-20251101, then use the exact model ID and a supported endpoint from the API access section. Request fields depend on the selected endpoint.

How is claude-opus-4-5-20251101 priced?

Pricing depends on the selected provider group and the model billing unit. Refer to the current input, output, request, or media prices in the pricing section.

What is the context window of claude-opus-4-5-20251101?

The model catalog lists a context window of 200000 tokens. Check the selected endpoint for request limits.

What is the maximum output of claude-opus-4-5-20251101?

The model catalog lists a maximum output of 64000 tokens. Your request settings may set a lower limit.

How should I evaluate claude-opus-4-5-20251101 for my project?

Start with the use cases and prompting guidance on this page, then evaluate the model with representative inputs from your project.

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