# Anthropic model releases

15 confirmed Anthropic releases, newest first. Every entry links to the source used for its date.

| Confirmed | Provider | Release | Models | Evidence |
|---|---|---|---|---|
| Sep 1, 2026 | Anthropic | Claude Fable 5.1 and Claude Mythos 5.1 | [Claude Fable 5.1](https://benchlm.ai/models/claude-fable-5-1), [Claude Mythos 5.1](https://benchlm.ai/models/claude-mythos-5-1) | [Anthropic](https://www.anthropic.com/claude-fable-and-mythos-5-1) |
| Jul 24, 2026 | Anthropic | Claude Opus 5 | [Claude Opus 5](https://benchlm.ai/models/claude-opus-5) | [Anthropic](https://www.anthropic.com/news/claude-opus-5) |
| Jun 30, 2026 | Anthropic | Claude Sonnet 5 | [Claude Sonnet 5](https://benchlm.ai/models/claude-sonnet-5) | [Anthropic](https://www.anthropic.com/news/claude-sonnet-5) |
| Jun 9, 2026 | Anthropic | Claude Fable 5 and Claude Mythos 5 | [Claude Mythos 5](https://benchlm.ai/models/claude-mythos-5), [Claude Fable 5](https://benchlm.ai/models/claude-fable) | [Anthropic](https://www.anthropic.com/news/claude-fable-5-mythos-5) |
| May 28, 2026 | Anthropic | Claude Opus 4.8 | [Claude Opus 4.8](https://benchlm.ai/models/claude-opus-4-8) | [Anthropic](https://www.anthropic.com/news/claude-opus-4-8) |
| Apr 16, 2026 | Anthropic | Claude Opus 4.7 | [Claude Opus 4.7](https://benchlm.ai/models/claude-opus-4-7), [Claude Opus 4.7 (Adaptive)](https://benchlm.ai/models/claude-opus-4-7-adaptive) | [Anthropic announcement](https://www.anthropic.com/news/claude-opus-4-7) |
| Apr 7, 2026 | Anthropic | Claude Mythos Preview | [Claude Mythos Preview](https://benchlm.ai/models/claude-mythos-preview) | [Anthropic Project Glasswing](https://www.anthropic.com/glasswing) |
| February 2026 (month precision) | Anthropic | Claude 4.6 | [Claude Opus 4.6](https://benchlm.ai/models/claude-opus-4-6), [Claude Sonnet 4.6](https://benchlm.ai/models/claude-sonnet-4-6) | [Anthropic system card](https://www-cdn.anthropic.com/14e4fb01875d2a69f646fa5e574dea2b1c0ff7b5.pdf) |
| November 2025 (month precision) | Anthropic | Claude Opus 4.5 | [Claude Opus 4.5](https://benchlm.ai/models/claude-opus-4-5) | [Anthropic](https://www.anthropic.com/system-cards) |
| Oct 15, 2025 | Anthropic | Claude Haiku 4.5 | [Claude Haiku 4.5](https://benchlm.ai/models/claude-haiku-4-5) | [Anthropic](https://www.anthropic.com/news/claude-haiku-4-5) |
| September 2025 (month precision) | Anthropic | Claude Sonnet 4.5 | [Claude Sonnet 4.5](https://benchlm.ai/models/claude-sonnet-4-5) | [Anthropic](https://www.anthropic.com/system-cards) |
| August 2025 (month precision) | Anthropic | Claude 4.1 Opus | [Claude 4.1 Opus](https://benchlm.ai/models/claude-4-1-opus) | [Anthropic](https://www.anthropic.com/system-cards) |
| May 2025 (month precision) | Anthropic | Claude 4 | [Claude 4 Sonnet](https://benchlm.ai/models/claude-4-sonnet) | [Anthropic](https://www.anthropic.com/system-cards) |
| June 2024 (month precision) | Anthropic | Claude 3.5 Sonnet | [Claude 3.5 Sonnet](https://benchlm.ai/models/claude-3-5-sonnet) | [Anthropic](https://www.anthropic.com/system-cards) |
| March 2024 (month precision) | Anthropic | Claude 3 family | [Claude 3 family](https://benchlm.ai/models/claude-3-opus), [Claude 3 family](https://benchlm.ai/models/claude-3-haiku) | [Anthropic](https://assets.anthropic.com/m/61e7d27f8c8f5919/original/Claude-3-Model-Card.pdf) |

Provider dossier: https://benchlm.ai/providers/anthropic

Canonical page: https://benchlm.ai/model-updates/providers/anthropic