Model specification · Anthropic
Claude Sonnet 4.5
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...
SpecificationsReported values
- Context window
- 1M
- Maximum output
- 64K
- Architecture
- text+image+file->text
- Tokenizer
- Claude
- Knowledge cutoff
- 2025-01-31
- Moderated
- Yes
- Input modalities
- text image file
- Output modalities
- text
Full pricingUSD where reported
| Price | Standard |
|---|---|
| Input | $3.00 / M |
| Output | $15.00 / M |
Benchmark indexesReported indexes
- Intelligence
- 36.4
- Coding
- 52.1
- Agentic
- 24.6
- Design Arena Elo
- 1191
Example workload costsStandard pricing only
| Workload | Input / output | Cache share | Estimated cost |
|---|---|---|---|
| Quick check | 10K / 1K × 1 | 0% | $0.045 |
| Long analysis | 100K / 4K × 1 | 50% | $0.225 |
| Workday | 20K / 2K × 1,000 | 30% | $73.80 |
More from AnthropicAll Anthropic models
| Model | Context | Input / M | Output / M | Intel. |
|---|---|---|---|---|
| Claude Opus 5 | 1M | $5.00 | $25.00 | 60.7 |
| Claude Fable 5 | 1M | $10.00 | $50.00 | 59.9 |
| Claude Opus 4.8 | 1M | $5.00 | $25.00 | 55.7 |
| Claude Opus 4.7 | 1M | $5.00 | $25.00 | 53.5 |
| Claude Sonnet 5 | 1M | $2.00 | $10.00 | 53.4 |
| Claude Sonnet 4.6 | 1M | $3.00 | $15.00 | 47.2 |
| Claude Haiku 4.5 | 200K | $1.00 | $5.00 | 29.6 |
| Claude Sonnet 4 | 1M | $3.00 | $15.00 | 28.9 |