Claude 3 Sonnet (2024-02-29)
API ID claude-3-sonnet-20240229
claude-3-sonnet-20240229 was an Anthropic model, released February 2024.
- Status
- Retired
- Released
- February 2024
- Shutdown
- Jul 21, 2025
- Replacement
- Claude Sonnet 5.5claude-sonnet-5-5
claude-3-sonnet-20240229 stopped serving on July 21, 2025. Recommended replacement: claude-sonnet-5-5.
How to migrate to Claude Sonnet 5.5
Benchmarks
Scores as each source published themComparing with Claude 2.1, the previous model in this line. A score is compared only with the same benchmark from the same source, at the same setting where both have it. Full comparison: prices, limits, features
Arena
| Arena | Claude 3 Sonnet (2024-02-29) | Claude 2.1 | Change | Rank | Date | Source |
|---|---|---|---|---|---|---|
TextBy category
| 1281 ±4 | not rated | 301 of 415 109,284 votes | Oct 13, 2026 | source | |
| Text: Coding | 1318 ±7 | not rated | 292 of 410 18,888 votes | Oct 13, 2026 | source | |
| Vision | 1016 ±11 | not rated | 152 of 165 12,314 votes | Oct 9, 2026 | source |
Rated as claude-3-sonnet-20240229. Ratings come from people voting between two anonymous answers; Text and Vision are style-controlled, as on arena.ai. Data: Arena (arena.ai), CC BY 4.0.
Epoch AI
| Benchmark | Claude 3 Sonnet (2024-02-29) | Claude 2.1 | Change | Setting | Run | Source |
|---|---|---|---|---|---|---|
| GPQA Diamond | 40.6% | 33.0% | +7.6 pts | Jan 27, 2025 | source | |
| MATH Level 5 | 18.2% | not run | Jan 27, 2025 | source | ||
| OTIS Mock AIME 2024-2025 | 2.5% | 1.9% | +0.6 pts | Feb 25, 2025 | source |
Run independently by Epoch AI. Data: Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.
Price history
USD per 1M tokens, standard tierNo price history yet.
Prices
USD per 1M tokens, every type and band, by tierNo published prices.
Changelog
Changes we detected on Anthropic's pagesNo changes recorded yet.
Last checked · Sources: Anthropic models, Anthropic deprecations, Anthropic pricing, Anthropic model pages