Claude Sonnet 4 Thinking 32K
Anthropic
Key facts · verified Oct 29, 2026
Claude Sonnet 4 Thinking 32K is an Anthropic model released on 22 May 2025. It was retired on 15 June 2026. Its last listed API price was $3 per million input tokens and $15 per million output tokens. Its context window is 1M tokens. It ranks #163 on LMArena's text leaderboard (Elo 1402, read 2 Nov 2026). Source: platform.claude.com.
Claude Sonnet 4 Thinking 32K is the LMArena listing of Anthropic's Claude Sonnet 4 (claude-sonnet-4-20250514) with extended thinking. Anthropic deprecated the model on April 14, 2026 and it was available on the Claude API until it was retired on June 15, 2026; Amazon Bedrock lists end of life on October 14, 2026. It was priced at $3 per million input tokens and $15 per million output tokens. 1402 Elo (rank 163)
Pricing & specs checkedSource: vendor documentation · checked Oct 29, 2026LMArena: 1402 Elo (rank 163) · source · retrieved Nov 2, 2026
Full Specifications
$3 / $15 per million tokens | |
|---|---|
| Identity | |
| Developer | Anthropic |
| Released | May 2025 |
| Retired | 15 June 2026 |
| Status | Retired. Anthropic retired claude-sonnet-4-20250514 on the Claude API on 15 June 2026; Amazon Bedrock lists end of life on 14 October 2026. |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $6.000 / 1M tokens |
| Input price | $3.000 / 1M tokens |
| Output price | $15.000 / 1M tokens |
| Capacity | |
| Context window | 1M tokens |
| Measured quality | |
| LMArena Elo | 1402 (checked Nov 2026) |
| LMArena rank | Rank 163 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 234 |