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Claude Sonnet 4.5
anthropic·anthropic/claude-sonnet-4-5-20250929·GA·Closed·claude-sonnet series
Balanced Claude model for coding, analysis, agent workflows, and cost control
At a glance
Official price$3.00 / $15.00 per 1M
Cache read $0.30 · Anthropic
Lowest paid$0.43 / $2.14
QiHang Gateway · 8.7× spread
Context1,000,000
⚠ Providers report 198,000–1,000,000; the table below is authoritative
Output limit64,000
Capabilities
✓ Reasoning✓ Tool use✓ Structured output✓ Temperature✓ Attachments
Modalities
TextImagePDF
Knowledge cutoff2025-07-31
Released / updated2025-09-29 / 2025-09-29
Quality & performance
Artificial Analysis doesn't cover this model (267 of 2059 have data). Quality data comes from independent evals covering widely used models.
Available at 18 providers18 with public prices
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| QiHang | Gateway | $0.43 | $2.14 | — | — | 200,000 ⚠ | 64,000 | |
| Poe anthropic/claude-sonnet-4.5 | Gateway | $2.60 | $13.00 | $0.26 | $3.20 | 983,040 ⚠ | 32,768 | |
| NanoGPT | Gateway | $3.00 | $15.00 | $0.30 | — | 1,000,000 | 64,000 | |
| Vertex claude-sonnet-4-5@20250929 | First-party | $3.00 | $15.00 | $0.30 | $3.75 | 200,000 ⚠ | 64,000 | |
| Vertex (Anthropic) claude-sonnet-4-5@20250929 | Cloud | $3.00 | $15.00 | $0.30 | $3.75 | 200,000 ⚠ | 64,000 | |
| AnthropicOfficial | First-party | $3.00 | $15.00 | $0.30 | $3.75 | 1,000,000 | 64,000 | |
| Databricks databricks-claude-sonnet-4 | Cloud | $3.00 | $15.00 | $0.30 | $3.75 | 200,000 ⚠ | 64,000 | |
| Amazon Bedrock anthropic.claude-sonnet-4-5-20250929-v1:0 | Cloud | $3.00 | $15.00 | $0.30 | $3.75 | 200,000 ⚠ | 64,000 | |
| ZenMux anthropic/claude-sonnet-4.5 | Gateway | $3.00 | $15.00 | $0.30 | $3.75 | 1,000,000 | 64,000 | |
| Perplexity Agent anthropic/claude-sonnet-4-5 | Gateway | $3.00 | $15.00 | $0.30 | — | 200,000 ⚠ | 64,000 | |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.
Your usage cost
1QiHang$193.00
2Poe$889.20
3NanoGPT$1,026.00
4Vertex$1,026.00
5Vertex (Anthropic)$1,026.00
6Anthropic · Official$1,026.00
Switch to QiHang to save $833.00/mo (81%)
Note: this is a gateway; verify availability and rate limits yourself.
Benchmark
No upstream benchmark data for this model. For quality, see the Artificial Analysis intelligence score above.
Reasoning control
budget_tokens ≥ 1,024 ≤ 63,999effort = loweffort = mediumeffort = higheffort = xhigheffort = maxToggle (on / off)
3 / 18 providers expose no reasoning control (reasoning_options: []).
Related models
Claude Sonnet 5same series$2.00 / $10.00Claude Sonnet 5 Thinkingsame series$2.00 / $10.00Claude Sonnet 5 (JP)same series$2.00 / $10.00GLM-5.2cheaper alternative$1.40 / $4.40DeepSeek V4 Procheaper alternative$0.435 / $0.87DeepSeek V4 Flashcheaper alternative$0.14 / $0.28DeepSeek V4 Flash 0731cheaper alternative$0.479 / $1.44
Price historyone sample accumulated per data sync
Input listOutput listMin blended