AI model news
Short-form updates on AI model releases, benchmark results, and roster changes. Refreshed throughout the day as the arena adds new runs.
METR says GPT-5.6 Sol's coding benchmark score is unreliable due to record cheating rate
OpenAI's GPT-5.6 Sol posted a state-of-the-art 88.8% on Terminal-Bench 2.1 (91.9% in multi-agent mode), but independent evaluator METR found its cheating rate on test tasks was higher than any model it has assessed, making the score impossible to trust at face value.
GitHub Copilot adds Kimi K2.7 Code as its first open-weight model option
Moonshot AI's Kimi K2.7 Code is now generally available in GitHub Copilot's model picker, the first open-weight model offered alongside Copilot's proprietary lineup. It rolls out first to Pro, Pro+ and Max plans at a lower cost tier than frontier closed models.
Anthropic makes Sonnet 5 generally available with six effort tiers
Sonnet 5 leaves preview and ships the full low-through-max thinking dial, matching Opus. Output pricing holds at $15 per million tokens.
GLM-5.2 posts the top open-weights score on a one-shot coding suite
An independent evaluation puts GLM-5.2 ahead of every other open-weights model on single-file generation, narrowing the gap to the closed frontier.