• Added new features.
• Improved for improvements to existing functionality.
• Removed for now removed features.
• Fixed for any bug fixes.

September 13, 2026 (2026-09-13-base, Model 4.10b aka 4o) | released on September 18, 2026

Improved

• Decreased false positive rate on a variety of domains
• Improved performance on third party benchmarks

August 12, 2026 (2026-08-09-base, Model 4.9b) | released on August 12, 2026

Improved

• Improved recall on frontier LLMs including Claude 5, GPT 5.6, Gemini 3.6, and Grok 4.5 series models

August 1, 2026 (2026-08-01-base, Model 4.8b) | released on August 1, 2026

Added

• Robustness to headers; headers are now excluded from our model’s input

July 10, 2026 (2026-07-04-base, Model 4.7b) | released on July 11, 2026

Improved

• Improved performance on academic benchmarks