Anthropic Teases Sonnet 5.5 and Haiku 5.5 Within Weeks
Anthropic's mikeyk announced that Claude Sonnet 5.5 and Haiku 5.5 will launch in the coming weeks, bringing performance, efficiency, and safety improvements in line with the Opus 5.5 family.
2026-09-23 ~ 2026-09-23 · 2 related posts
- Episode 1: Claude Opus 5.5 Spotted in Claude Code Ahead of Imminent Launch(2026-09-23, 8 posts)
- Episode 2: Anthropic Launches Claude Opus 5.5: Stronger, 40% Cheaper, Tops AA Index(2026-09-23, 259 posts)
- Episode 3: Anthropic Launches Banked Usage Resets Alongside Opus 5.5(2026-09-23, 10 posts)
- Episode 4: Perplexity Rolls Out Opus 5.5 to All Users, Citing 67.6% Cost Savings(2026-09-23, 2 posts)
- Episode 5: Anthropic Teases Sonnet 5.5 and Haiku 5.5 Within Weeks(2026-09-23, 2 posts)
- Episode 6: Claude Code 2.1.280 Ships with Opus 5.5 as Default Model(2026-09-23, 3 posts)
- Episode 7: Claude Opus 5.5 Rumored to Fall Back to Weaker Models on Frontier Dev Tasks(2026-09-23, 4 posts)
- Episode 8: Claude Opus 5.5 Sparks Wave of Community Demos Within 24 Hours(2026-09-23, 14 posts)
- Episode 9: Dev recreates Minecraft in browser with Opus 5.5(2026-09-23, 2 posts)
- Episode 10: Rumor: Claude Opus 5.5 Stuns OpenAI, GPT-6.1 Timeline Squeezed(2026-09-23, 3 posts)
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- Episode 12: Developers Say Opus 5.5 Is Faster, Cheaper and Back as Daily Coding Model(2026-09-23, 4 posts)
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- Episode 16: Claude Opus 5.5 Delivers Fast, Proactive Coding That Developers Say Enables Flow State(2026-09-24, 2 posts)
- Anthropic Teases Claude Sonnet 5.5 and Haiku 5.5 Launching in Coming Weeks — mikeyk · 2026-09-23
- Anthropic confirms Claude Sonnet 5.5 and Haiku 5.5 launching in coming weeks — alexalbert__ · 2026-09-23