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Anthropic: Claude Sonnet 5.5 API Pricing
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
How much does Anthropic: Claude Sonnet 5.5 cost for a real workload?
At 10M input + 2M output tokens per month, Anthropic: Claude Sonnet 5.5 costs about $40 ($20 input + $20 output). Try your own volumes in the cost calculator.
What is the official Anthropic: Claude Sonnet 5.5 price?
| Official (anthropic) | Catalog (OpenRouter) | |
|---|---|---|
| Input /1M | $2 | $2 |
| Output /1M | $10 | $10 |
| Cached input /1M | $0.1 | $0.1 |
✓ Matches the official list price. Source: anthropic official pricing page, checked 2026-10-21.
What are cheaper alternatives to Anthropic: Claude Sonnet 5.5?
- Z.ai: GLM 5.3 Prime — $2.8 in / $8.8 out per 1M
- OpenAI: GPT-5.1-Codex-Max — $1.25 in / $10 out per 1M
- OpenAI: GPT-5.1 — $1.25 in / $10 out per 1M
- OpenAI: GPT-5.1-Codex — $1.25 in / $10 out per 1M
- OpenAI: GPT-5 — $1.25 in / $10 out per 1M
- Google: Gemini 2.5 Pro — $1.25 in / $10 out per 1M
Compare Anthropic: Claude Sonnet 5.5 with other models
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Frequently asked questions
How much does Anthropic: Claude Sonnet 5.5 cost?
Anthropic: Claude Sonnet 5.5 costs $2 per 1M input tokens and $10 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $40.
What is the context window of Anthropic: Claude Sonnet 5.5?
Anthropic: Claude Sonnet 5.5 has a context window of 1,000,000 tokens and can return up to 128,000 output tokens per response.
What are cheaper alternatives to Anthropic: Claude Sonnet 5.5?
Cheaper models include Z.ai: GLM 5.3 Prime ($2.8 in / $8.8 out), OpenAI: GPT-5.1-Codex-Max ($1.25 in / $10 out), OpenAI: GPT-5.1 ($1.25 in / $10 out). See the full list on this page.
Is Anthropic: Claude Sonnet 5.5 free to use?
No. Anthropic: Claude Sonnet 5.5 is a paid model at $2 input / $10 output per 1M tokens. 20 free models are listed on the free models page.
What is the official price of Anthropic: Claude Sonnet 5.5?
On anthropic's official pricing page (checked 2026-10-21), Anthropic: Claude Sonnet 5.5 is listed at $2 per 1M input tokens and $10 per 1M output tokens. The catalog price tracked on this page matches it exactly.
Provider: anthropic · Model ID: anthropic/claude-sonnet-5.5 · Modality: text+image+file->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices