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Anthropic: Claude Sonnet 4.5 API Pricing
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
How much does Anthropic: Claude Sonnet 4.5 cost for a real workload?
At 10M input + 2M output tokens per month, Anthropic: Claude Sonnet 4.5 costs about $60 ($30 input + $30 output). Try your own volumes in the cost calculator.
What is the official Anthropic: Claude Sonnet 4.5 price?
| Official (anthropic) | Catalog (OpenRouter) | |
|---|---|---|
| Input /1M | $3 | $3 |
| Output /1M | $15 | $15 |
| Cached input /1M | $0.3 | $0.3 |
✓ Matches the official list price. Source: anthropic official pricing page, checked 2026-10-21.
What are cheaper alternatives to Anthropic: Claude Sonnet 4.5?
- OpenAI: GPT-5.5 (batch) — $2.5 in / $15 out per 1M
- OpenAI: GPT-5.4 — $2.5 in / $15 out per 1M
- MoonshotAI: Kimi Latest — $0.238 in / $16 out per 1M
- Qwen: Qwen3.8 Max Prime — $4 in / $12 out per 1M
- OpenAI: GPT-5.3-Codex — $1.75 in / $14 out per 1M
- OpenAI: GPT-5.2-Codex — $1.75 in / $14 out per 1M
Compare Anthropic: Claude Sonnet 4.5 with other models
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Frequently asked questions
How much does Anthropic: Claude Sonnet 4.5 cost?
Anthropic: Claude Sonnet 4.5 costs $3 per 1M input tokens and $15 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $60.
What is the context window of Anthropic: Claude Sonnet 4.5?
Anthropic: Claude Sonnet 4.5 has a context window of 1,000,000 tokens and can return up to 64,000 output tokens per response.
What are cheaper alternatives to Anthropic: Claude Sonnet 4.5?
Cheaper models include OpenAI: GPT-5.5 (batch) ($2.5 in / $15 out), OpenAI: GPT-5.4 ($2.5 in / $15 out), MoonshotAI: Kimi Latest ($0.238 in / $16 out). See the full list on this page.
Is Anthropic: Claude Sonnet 4.5 free to use?
No. Anthropic: Claude Sonnet 4.5 is a paid model at $3 input / $15 output per 1M tokens. 20 free models are listed on the free models page.
What is the official price of Anthropic: Claude Sonnet 4.5?
On anthropic's official pricing page (checked 2026-10-21), Anthropic: Claude Sonnet 4.5 is listed at $3 per 1M input tokens and $15 per 1M output tokens. The catalog price tracked on this page matches it exactly.
Provider: anthropic · Model ID: anthropic/claude-sonnet-4.5 · Modality: text+image+file->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices