Claude Opus 4 Thinking 16K
Anthropic
Key facts · verified Oct 29, 2026
Claude Opus 4 Thinking 16K is an Anthropic model. It was retired on 15 June 2026. Its last listed API price was $15 per million input tokens and $75 per million output tokens. Its context window is 200K tokens. It ranks #123 on LMArena's text leaderboard (Elo 1426, read 1 Nov 2026). Source: platform.claude.com.
Claude Opus 4 Thinking 16K is the LMArena listing of Anthropic's Claude Opus 4 (claude-opus-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. It was priced at $15 per million input tokens and $75 per million output tokens, with a 200K-token context window. 1426 Elo (rank 123)
Pricing & specs checkedSource: vendor documentation · checked Oct 29, 2026LMArena: 1426 Elo (rank 123) · source · retrieved Nov 1, 2026
Full Specifications
$15 / $75 per million tokens | |
|---|---|
| Identity | |
| Developer | Anthropic |
| Retired | 15 June 2026 |
| Status | Retired. Anthropic retired claude-opus-4-20250514 on the Claude API on 15 June 2026, and its pricing page lists it as retired except on Google Cloud. |
| Licence | Proprietary |
| Self-hostable | No |
| Cost | |
| Blended $/1M tokensinput × 0.75 + output × 0.25 | $30.000 / 1M tokens |
| Input price | $15.000 / 1M tokens |
| Output price | $75.000 / 1M tokens |
| Capacity | |
| Context window | 200K tokens |
| Measured quality | |
| LMArena Elo | 1426 (checked Nov 2026) |
| LMArena rank | Rank 123 |
| Elo per dollarLMArena Elo ÷ blended $/1M tokens | 48 |