Type: AI model or model family
Concepts: LLM Evals Code Agents Agents Tool Use Mentioned alongside: Claude Haiku 5.5 Anthropic Claude Opus 5.5 GPT-5.6 Sol Opus 5 Recent briefs: 2026-10-08 2026-10-07 2026-09-30 2026-09-28
Recent Updates
- 2026-09-22: Anthropic Introduces Claude Opus 5.5 with Performance Gains and Price Reductions (breakingnewsofficial) · anthropic.com — Code Agents LLM Evals Anthropic · Frontier Design · METR · Claude Opus 5.5 Claude 5.5 · Claude Fable 5.1 · Opus 5 · Claude Mythos 5.1 · Claude Haiku 5.5
- 2026-09-22: Anthropic Introduces Claude Opus 5.5 with Lower Costs and Performance Gains (breakingnewsofficial) · anthropic.com — Code Agents LLM Evals Anthropic · Frontier Design · METR · Claude Opus 5.5 Claude 5.5 · Claude Fable 5.1 · Opus 5 · Claude Mythos 5.1 · Claude Haiku 5.5
- 2026-09-28: Anthropic Introduces Claude Sonnet 5.5 with Coding and Speed Improvements (breakingnewsofficial) · anthropic.com — Code Agents LLM Evals Tool Use Anthropic · Cursor · Claude Sonnet 5 · Claude Opus 5.5 · Claude Haiku 5.5 · Opus 5
- 2026-09-30: GPT-6.1 Sol Replaces GPT-6 Sol with Near-Astra Intelligence at Lower Cost per Task (breakingnewsofficial) · artificialanalysis.ai — LLM Evals Code Agents Artificial Analysis · GPT-6.1 Sol · GPT-6 Sol · GPT-6 Astra · GPT-5.6 Sol
- 2026-10-07: Claude Haiku 5.5 Released with Adjustable Effort and Reduced Pricing (breakingnewsofficial) · anthropic.com — Agents LLM Evals Hacker News · AWS · Google Cloud · Microsoft Azure · Claude Haiku 5.5 · Opus 5.5 · Sonnet 5.5 · Haiku 4.5 · Sonnet 5 · Opus 5
- 2026-10-08: Anthropic Releases Claude Haiku 5.5 with Effort Tuning and Pricing Cuts Amid API Breaking Changes (breakingnewsofficial) · qbitai.com — Agents Code Agents Tool Use LLM Evals Anthropic · OpenAI · Cognition · Intel · AMD · QbitAI Meng Chen Diogo Almeida Shing-Tung Yau Fei-Fei Li Lisa Su · Claude Haiku 5.5 · Claude Haiku 4.5 · GPT-6 Luna DeepSeek V4.1Flash · GLM-5.3-Flash · Claude Opus 5.5 Claude Fable 5.5 · Claude · GPT
- 2026-10-08: Measuring Cross-Jurisdiction Substitution in LLM Recall of State Policy (breakingnewsofficial) · arxiv.org — LLM Evals GPT-5.6 Sol
FAQ
What is Claude Sonnet 5.5?
Claude Sonnet 5.5 appears in the radar stream as a model or model family. This page is a living index of dated mentions and sources — open Recent Updates and Backlinks for context, not a full product brief.
What does this page track?
Dated radar mentions, source links, related concepts, and builder-relevant context for Claude Sonnet 5.5, collected automatically by GROUNDING.
When was Claude Sonnet 5.5 last mentioned?
Claude Sonnet 5.5 was most recently mentioned in a radar update dated 2026-10-08.
Category: Text / Language Models