Claude 3 Sonnet vs Claude Opus 4.7 (Fast)
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Claude 3 Sonnet and Claude Opus 4.7 (Fast).
Claude 3 Sonnet
Claude 3 Sonnet was Anthropic's balanced standard model in the first Claude 3 generation, optimized for a combination of response speed and general-purpose capabilities across writing, summarization, and question answering. Released in March 2024 alongside Opus and Haiku, it occupied the mid-tier positioning in the Claude 3 lineup. Claude 3 Sonnet has since been deprecated, and current use cases requiring similar capability-to-cost balance are best served by the Claude 4 Sonnet series, which offers substantially improved reasoning, context handling, and instruction following at competitive pricing.
Claude Opus 4.7 (Fast)
Fast-mode variant of [Opus 4.7](/anthropic/claude-opus-4.7) - identical capabilities with higher output speed at premium 6x pricing. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
Technical Specifications
| Specification | Claude 3 Sonnet | Claude Opus 4.7 (Fast) |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Context Window | 200,000 tokens | 1,000,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | N/A | managed api |
| Production Stability | stable | beta |
| API Available | Yes | Yes |
| Released Date | 2024-03-04 | 2026-05-12 |
API Pricing Comparison
Input Price per Million Tokens
Claude 3 Sonnet
$3.00
Claude Opus 4.7 (Fast)
$30.00
Output Price per Million Tokens
Claude 3 Sonnet
$15.00
Claude Opus 4.7 (Fast)
$150.00
Want to test both models live?
Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.
Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Claude 3 Sonnet Quirks & Gotchas
No developer gotchas reported.
Claude Opus 4.7 (Fast) Quirks & Gotchas
No developer gotchas reported.