Claude Sonnet 4.6
Claude is a series of large language models developed by Anthropic. The first model was released in March 2023, and the latest, Claude Sonnet 4.6, in February 2026.
Timeline
4- Research MilestoneMar 26, 2026
Used in prompt compression study analyzing 358 successful runs from 1,199 real orchestration instructions
View source- runs analyzed:
- 358
- total instructions:
- 1199
- Product LaunchMar 20, 2026
Anthropic released Claude Sonnet 4.6 with native chain-of-thought reasoning mode for complex coding tasks
- Product LaunchMar 17, 2026
Service disruption with elevated error rates reported on status page
View source
Relationships
5Uses
Developed
Recent Articles
9Alumnium MCP Hits 98.5% on WebVoyager: How to Add SOTA Browsing to Claude Code
+The open-source Alumnium MCP server, which acts as a high-level browser subagent for Claude Code, just set a new state-of-the-art benchmark score. Ins
100 relevanceClaude Code's Opus 4.6 Outage: How to Switch Models and Keep Working
~When Opus 4.6 experiences elevated error rates, switch to Sonnet 4.6 or Haiku via CLI flags to maintain Claude Code productivity.
100 relevancePrompt Compression in Production Task Orchestration: A Pre-Registered Randomized Trial
~A new arXiv study shows that aggressive prompt compression can increase total AI inference costs by causing longer outputs, while moderate compression
76 relevanceClaude Opus 4.6's Security Audit Power Is Now in Claude Code
+The new Claude Opus 4.6 model, which found 500+ high-severity open-source flaws, is now available in Claude Code for automated security auditing.
80 relevanceClaude Sonnet 4.6 Is Live: How to Use the New 'Budget Flagship' Model in Claude Code
+Anthropic's new Claude Sonnet 4.6 model offers near-Opus performance at a Sonnet price. Here's how to configure Claude Code to use it for maximum effi
89 relevanceCodeset: Boost Claude Code's Task Success Rate by 10% with Project History
+Codeset analyzes your git history to generate contextual docs that make Claude Code 10% more effective at completing coding tasks.
100 relevanceHow to Stay Productive When Claude Code Hits Elevated Error Rates
-A spike in errors on Sonnet 4.6 is a reminder to have a backup plan. Here’s how to keep coding without losing momentum.
100 relevanceClaude Sonnet 4.5 vs 4.0: What the Quality Regression Means for Your Claude Code Workflow
-Recent analysis shows Claude Sonnet 4.5 may have quality regressions vs 4.0. Here's how Claude Code users should adapt their prompting and model selec
86 relevanceClaude Code's 1M Context Window is Now Free: How to Use It Today
+Claude Opus 4.6 and Sonnet 4.6 now include the full 1 million token context window at standard pricing by default in Claude Code. No premium, no extra
100 relevance
Predictions
No predictions linked to this entity.
AI Discoveries
3- observationactive6d ago
Velocity spike: Claude Sonnet 4.6
Claude Sonnet 4.6 (ai_model) surged from 1 to 3 mentions in 3 days (velocity_spike).
80% confidence - observationactiveMar 20, 2026
Sentiment reversal: Claude Sonnet 4.6
Claude Sonnet 4.6 sentiment flipped from -0.45 to 0.25 (negative→positive).
70% confidence - observationactiveMar 17, 2026
Lifecycle: Claude Sonnet 4.6
Claude Sonnet 4.6 is in 'active' phase (1 mentions/3d, 3/14d, 6 total)
90% confidence
Sentiment History
| Week | Avg Sentiment | Mentions |
|---|---|---|
| 2026-W09 | -0.03 | 3 |
| 2026-W11 | 0.70 | 1 |
| 2026-W12 | -0.17 | 3 |
| 2026-W13 | 0.38 | 5 |