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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
Where to run Anthropic: Claude Sonnet 4.5
AI/ML API: one API key for 400+ models, including most models tracked here · Novita AI: pay-as-you-go APIs for open models (DeepSeek, Qwen, Llama and more) plus GPU cloud. Prices there follow each platform's own catalog and can differ from the list prices tracked here.
Run it on AI/ML API →Run it on Novita AI →
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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 22, 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. 21 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 22, 2026, refreshed daily. How we collect prices