1 NovClaude Mythos 5.5 has been spotted on Anthropic’s official website It’s mentioned four times in the page’s code, and it looks like the release is coming soon, with Fable 5.5 following shortly after.ClaudeFable 5AnthropicClaude
21 OctClaude Duet, a proactive AI agent from Anthropic, is coming soon. OpenAI has Dots, xAI has Grok Bot, and there’s also Hermes Agent. Now Anthropic is joining the race. Looks like we’re moving from the era of coding harnesses to the era of proactive agents that can orchestrate…ClaudeAnthropicClaude DuetAgent harnesses
13 Oct🚨 Fable 5.5 appeared in Azure’s East US 2 model catalog with GenerallyAvailable status https://github.com/BerriAI/litellm/commit/7dd53d6adc6213e84f62f1366ba721d09f4af992Fable 5AnthropicClaude
28 SepClaude Sonnet 5.5 is already rolling out in stealth. A lot of users, including free users, are being routed to it. The release is very close.ClaudeAnthropicClaude
22 SepLittle Haiku is finally coming back. I think it’ll give GPT-6 Luna some solid competition.AnthropicClaude
20 Sep🚨 New Claude Opus drops early next week It will likely be called Opus 5.5 $4/$20 input/output pricing, 20% cheaper than Opus 5ClaudeAnthropicClaude
15 Sep🚨 Opus 5.2 appeared in the Microsoft Foundry catalog At first glance it looks like a leak, but the -2 may simply refer to Foundry’s version 2 deployment rather than a new Claude model. Still worth keeping an eye on.ClaudeAnthropicClaude
8 Sep🚨 Fable 5.2 could launch this month after Astra’s strong debut Anthropic is reportedly preparing its first fresh pretrain for Fable ahead of its IPO. People there are confident it can dethrone Astra. For context: Fable 5.1 and GPT 6 Astra currently share #1 on AA, with Fable…Fable 5AnthropicClaude
31 AugFable 5.1 is now registered in the AWS Bedrock API, so the release is probably getting really close. Not sure I’d bet on the 48 hour estimate, but a release within the next week feels pretty realistic.Fable 5AnthropicClaude
26 Aug⚡️ Anthropic may already be A/B testing Fable 5.1 People are checking it like this: regular Fable 5 has a January 2026 knowledge cutoff, while Opus 4.6 came out later. If the model knows those dates without web or tools, you may already be getting Fable 5.1. Prompt: Release…Fable 5AnthropicClaude
