Claude Sonnet 4.5
Provider：Anthropic
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...
Key specs
- Context：1M
- Max output：64K
- Tokenizer：Claude
- Released：2025-09-29
Token pricing
- Input price：$3.00 / 1M tokens
- Output price：$15.00 / 1M tokens
- Cache read：$0.300 / 1M tokens
- Cache write：$3.75 / 1M tokens
- Blended price：$6.00 / 1M tokens
Modalities
Text, Image, File
Use Cases
- Deep Reasoning & Analysis：Process long legal docs, academic papers, financial reports; multi-hop reasoning and evidence-chain tracing across huge contexts.（≈ $0.120/call）
- Vision Understanding & Generation：Recognize data trends in charts, OCR scanned docs, analyze photos and produce structured reports.（≈ $0.090/call）
- Chat & Support：FAQ auto-response, multi-turn dialogue, emotion detection — e-commerce, finance, gov.（≈ $0.030/call）
- Content Moderation：Auto-detect violations, hate speech, NSFW content; custom rule sets and score thresholds.
When to pick this model
Signals derived from public pricing and spec fields — not a benchmark. Validate with official docs and your own eval.
- Long context (>=1M tokens): well-suited for long-doc QA, code-base analysis, multi-turn agents.
- Long max output (>=30K tokens): strong fit for deep report / essay / document-drafting workflows.
- Multimodal (text+image): fit for image captioning, OCR, chart QA, vision-grounded reasoning.
- File / PDF input support: fit for document parsing, contract review, RAG over private data.
FAQ
- What is the token pricing of Claude Sonnet 4.5? Input price $3.00 / 1M tokens, output price $15.00 / 1M tokens, blended about $6.00 / 1M tokens. Refer to Anthropic’s official page for the exact rate.
- What context window does Claude Sonnet 4.5 support? Context window is 1M, max output about 64K, suitable for long documents, multi-turn chat and complex reasoning.
- What scenarios is Claude Sonnet 4.5 best for? Based on its capability and pricing, Claude Sonnet 4.5 fits best: Deep Reasoning & Analysis, Vision Understanding & Generation, Chat & Support. See the Use Cases section for details and cost estimates.
- What input/output modalities does Claude Sonnet 4.5 support? Supports Text, Image, File modality.
- Is Claude Sonnet 4.5 a free model? Claude Sonnet 4.5 is billed per token, not a free model.
- Which provider offers Claude Sonnet 4.5? Claude Sonnet 4.5 is offered by Anthropic.
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Full info：Claude Sonnet 4.5