Claude Sonnet 4.5 20250929 Thinking API

Model ID: claude-sonnet-4-5-20250929-thinking · Anthropic · Billed per token

Claude Sonnet 4.5 20250929 Thinking pricing

AibermOfficial
Input$0.450 / 1M tokens$3.00
Output$2.25 / 1M tokens$15.00
Cache read$0.045 / 1M tokens
Cache write$0.562 / 1M tokens

Prices in USD. About 85% below the official price. Pay as you go, no minimum spend.

Get an API key · Read the docs

How to call Claude Sonnet 4.5 20250929 Thinking

Use your Aiberm API key, set the base URL, and pass claude-sonnet-4-5-20250929-thinking as the model name.

Supported request formats:

curl https://aiberm.org/v1/chat/completions \
  -H "Authorization: Bearer $AIBERM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "claude-sonnet-4-5-20250929-thinking", "messages": [{"role": "user", "content": "Hello"}]}'

Use Claude Sonnet 4.5 20250929 Thinking in your tools

FAQ

How much does the Claude Sonnet 4.5 20250929 Thinking API cost?

On Aiberm, Claude Sonnet 4.5 20250929 Thinking (claude-sonnet-4-5-20250929-thinking) costs $0.450 per 1M input tokens and $2.25 per 1M output tokens, compared with the official $3.00 / $15.00 — about 85% less. You pay only for the tokens you use, with no minimum spend.

How do I call Claude Sonnet 4.5 20250929 Thinking through Aiberm?

Set the base URL to https://aiberm.org, use claude-sonnet-4-5-20250929-thinking as the model name, and authenticate with your Aiberm API key. Supported request formats: Anthropic Messages, OpenAI Chat Completions.

Does Claude Sonnet 4.5 20250929 Thinking support prompt caching?

Yes. Cached input tokens are billed at $0.045 per 1M tokens, and writing to the cache at $0.562 per 1M tokens.

Can I use Claude Sonnet 4.5 20250929 Thinking in Claude Code, OpenCode or OpenClaw?

Yes. Add Aiberm as a provider in Claude Code, OpenCode, OpenClaw with the base URL and your API key, then select claude-sonnet-4-5-20250929-thinking. Each tool has a step-by-step guide in the Aiberm docs.

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