Claude AI models by Anthropic
| Model | API ID | Release | Cutoff | Conf. | Status | Notes |
|---|---|---|---|---|---|---|
| Claude Fable 5 | claude-fable-5 |
2026-06 | 2026-01 | high | active | Most capable widely released model. Reliable knowledge cutoff: Jan 2026. Training data cutoff: Jan 2026. 1M context, 128k output. |
| Claude Opus 4.8 | claude-opus-4-8 |
2026-03 | 2026-01 | high | active | For complex agentic coding and enterprise work. Reliable + training cutoff: Jan 2026. 1M context. |
| Claude Sonnet 5 | claude-sonnet-5 |
2026-03 | 2026-01 | high | active | Best speed/intelligence combination. Reliable + training cutoff: Jan 2026. Intro pricing $2/$10 per MTok through Aug 31 2026. |
| Claude Haiku 4.5 | claude-haiku-4-5-20251001 |
2025-10 | 2025-02 | high | active | Fastest model. Reliable knowledge cutoff: Feb 2025. Training data cutoff: Jul 2025. 200k context, 64k output. Extended thinking support. |
| Claude Opus 4.7 | claude-opus-4-7 |
2026-01 | 2026-01 | high | active | Legacy. Reliable cutoff: Jan 2026. Training data cutoff: Jan 2026. 1M context. |
| Claude Opus 4.6 | claude-opus-4-6 |
2025-11 | 2025-05 | high | active | Legacy. Reliable cutoff: May 2025. Training data cutoff: Aug 2025. Extended thinking: Yes. |
| Claude Sonnet 4.6 | claude-sonnet-4-6 |
2026-01 | 2025-08 | high | active | Legacy. Reliable cutoff: Aug 2025. Training data cutoff: Jan 2026. Extended thinking: Yes. |
| Claude Sonnet 4.5 | claude-sonnet-4-5-20250929 |
2025-09 | 2025-01 | high | active | Legacy. Reliable cutoff: Jan 2025. Training data cutoff: Jul 2025. 200k context. |
| Claude Opus 4.5 | claude-opus-4-5-20251101 |
2025-11 | 2025-05 | high | active | Legacy. Reliable cutoff: May 2025. Training data cutoff: Aug 2025. |
| Claude Opus 4.1 | claude-opus-4-1-20250805 |
2025-08 | 2025-01 | high | deprecated | DEPRECATED — retires Aug 5, 2026. Reliable cutoff: Jan 2025. Training data cutoff: Mar 2025. Migrate to Opus 4.8. |
| Claude 3.5 Sonnet (Oct) | claude-3-5-sonnet-20241022 |
2024-10 | 2024-04 | medium | active | Pre-Claude 4 generation. Still available. |
| Claude 3.5 Haiku | claude-3-5-haiku-20241022 |
2024-11 | 2024-07 | medium | active | Pre-Claude 4 generation. |
| Claude 3 Opus | claude-3-opus-20240229 |
2024-03 | 2023-08 | high | active | Pre-Claude 4 generation. |
| Claude 3 Sonnet | claude-3-sonnet-20240229 |
2024-03 | 2023-08 | high | active | Pre-Claude 4 generation. |
| Claude 3 Haiku | claude-3-haiku-20240307 |
2024-03 | 2023-08 | high | active | Pre-Claude 4 generation. |
Knowledge Cutoffs