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claude-sonnet-5 API pricing & access

claude-sonnet-5 API pricing: $2 per 1M tokens. claude-sonnet-5. Supports text, image input and text output. Listed specifications follow …

claude-sonnet-5 API access

claude-sonnet-5. 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-sonnet-5 through the unified API gateway.

Category: text
Context length: 1000000 tokens
Maximum output: 128000 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-sonnet-5 API pricing

Base input price: $2 per 1M tokens
Base output price: $10 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-sonnet-5

Claude Sonnet 5 can be evaluated for coding, analysis and agent workflows. The official model accepts text and images and returns text. It remains available as a legacy model; compare current tasks with Sonnet 5.5 before migrating instead of treating Sonnet 5 as the latest release.

Official Sonnet 5 uses adaptive thinking by default. Non-default temperature, top_p and top_k are rejected, and the old manual thinking request with type enabled and budget_tokens is no longer accepted. Omit inherited sampling settings initially and check the route’s thinking and output-budget contract.

Official reference, checked 2026-10-14.

Use cases and prompting

Provide objectives, constraints and verifiable output. Include failing examples and expected behavior for coding tasks.
Remove non-default sampling settings and manual budget_tokens thinking configuration from inherited requests. Check adaptive-thinking fields for the selected protocol.
Account for thinking and the final answer when setting output limits. Measure actual token usage instead of reusing an older model’s budget unchanged.
Compare identical tasks with Claude Sonnet 5.5 and Claude Opus 5.5. See the documentation for protocol examples.

How to call claude-sonnet-5

claude-sonnet-5 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-sonnet-5", "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-sonnet-5",
    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-sonnet-5",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello"}],
)
print(message.content[0].text)

Frequently asked questions about claude-sonnet-5

What is claude-sonnet-5?

claude-sonnet-5. 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-sonnet-5?

Create an API key with access to claude-sonnet-5, 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-sonnet-5 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-sonnet-5?

The model catalog lists a context window of 1000000 tokens. Check the selected endpoint for request limits.

What is the maximum output of claude-sonnet-5?

The model catalog lists a maximum output of 128000 tokens. Your request settings may set a lower limit.

How should I evaluate claude-sonnet-5 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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