Anthropic
Claude Sonnet 4.5
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...
Cost / 1M tokens
High usage$3.00
input
$0.30
cached input
$15.00
output
Context Window
1M
Up to 64K max output
Modalities
text, image, file → text
Claude tokenizer
Quickstart & API
anthropic/claude-sonnet-4.5Best for & Strengths
Key Strengths
Recommended Workloads in ChatOSS
- Coding agents
- Complex reasoning & debugging
- Screenshot-to-code workflows
Verified Evaluations
Benchmarks & Frontier Comparison
How Claude Sonnet 4.5 compares against leading open-weight and proprietary frontier models across independent agentic coding and reasoning suites.
| Benchmark (Metric) | Claude Sonnet 4.5 | DeepSeek V4.1 Flash | GLM 5.3 | Kimi K3.1 Pro | Claude Opus 5.5 |
|---|---|---|---|---|---|
| Agentic & Software Engineering | |||||
| ChatOSS Agentic Coding Index (%) | — | 63.2% | 58.3% | 65% | 74.1% |
| SWE-Bench Verified (%) | — | 91.5% | 95.4% | 94.8% | 97% |
| DeepSWE v1.1 (Pass@1 %) | — | 77% | 69% | 73.5% | 74.2% |
| Vibe Code Bench v1.1 (%) | — | 87.7% | 78.1% | 88.4% | 90.3% |
| Terminal-Bench 4.0 (%) | — | 42.3% | 42% | 46.2% | 65.2% |
| Code Migration (%) | — | 45.6% | 44.2% | 52% | 66.7% |
| Intelligence & Token Economics | |||||
| Artificial Analysis Intelligence Index (0–100) | — | 39.5 | 44.8 | 55.1 | 57.6 |
| Input Price (/ 1M tokens) | $3.00 | $0.15 | $1.40 | $2.00 | $4.00 |
| Output Price (/ 1M tokens) | $15.00 | $0.60 | $4.40 | $10.00 | $20.00 |
Design Arena: 3D
Design Arena · Rank #73 (51% win)
Design Arena: ASCIIART
Design Arena · Rank #26 (56.1% win)
Design Arena: Code Generation
Design Arena · Rank #69 (51.5% win)
Design Arena: Data Visualization
Design Arena · Rank #75 (47.4% win)
Active Provider Endpoints (7)
Upstream inference providers serving Claude Sonnet 4.5, with per-provider pricing, context limits, quantization, and 24-hour uptime.
| Provider | Input / 1M | Output / 1M | Cache Read / 1M | Context | Max Output | Quantization | Uptime (24h) |
|---|---|---|---|---|---|---|---|
Claude Platform on AWS claude-on-aws | $3.00 | $15.00 | $0.30 | 1M | 64K | — | 100.0% |
Azure azure/global | $3.00 | $15.00 | $0.30 | 200K | 64K | — | — |
Amazon Bedrock amazon-bedrock | $3.00 | $15.00 | $0.30 | 1M | 64K | — | 100.0% |
Anthropic anthropic | $3.00 | $15.00 | $0.30 | 1M | 64K | — | 100.0% |
Google google-vertex/global | $3.00 | $15.00 | $0.30 | 1M | 64K | — | 100.0% |
Amazon Bedrock amazon-bedrock/eu-west-1 | $3.30 | $16.50 | $0.33 | 1M | 64K | — | 100.0% |
Google google-vertex/us-east5 | $3.30 | $16.50 | $0.33 | 1M | 64K | — | — |
Supported API Parameters
Parameters accepted by this model when called through ChatOSS or OpenRouter.
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