https://modelgauntlet.com/briefings/Weekly race briefings and reviewed model release briefs with registered sources.en-ushttps://modelgauntlet.com/briefings/weekly/2026-07-15/https://modelgauntlet.com/briefings/weekly/2026-07-15/According to LMArena's July 12, 2026 snapshot, Anthropic holds a narrow lead over a compressed chase group, and the published confidence intervals overlap. Every claim in this briefing links to a named source and its date.Wed, 15 Jul 2026 12:00:00 GMThttps://modelgauntlet.com/briefings/claude-fable-5/https://modelgauntlet.com/briefings/claude-fable-5/Anthropic released Claude Fable 5 on June 9, 2026. It now scores 1507.5 in LMArena's July 12, 2026 snapshot, where it is Anthropic's leading model.Tue, 14 Jul 2026 12:00:00 GMThttps://modelgauntlet.com/briefings/gpt-5-5/https://modelgauntlet.com/briefings/gpt-5-5/OpenAI released GPT-5.5 on April 23, 2026. It gives OpenAI a new multimodal, language and vision option with API access, according to Epoch AI's catalog.Tue, 14 Jul 2026 12:00:00 GMThttps://modelgauntlet.com/briefings/gemini-flash-3-1-tts/https://modelgauntlet.com/briefings/gemini-flash-3-1-tts/Google released Gemini Flash 3.1 TTS on April 15, 2026. It gives Google a new audio option with API access, according to Epoch AI's catalog.Tue, 14 Jul 2026 12:00:00 GMThttps://modelgauntlet.com/briefings/muse-spark/https://modelgauntlet.com/briefings/muse-spark/Meta released Muse Spark on April 8, 2026. It gives Meta a new multimodal, language and vision option with API access, according to Epoch AI's catalog.Tue, 14 Jul 2026 12:00:00 GMThttps://modelgauntlet.com/briefings/grok-4-20/https://modelgauntlet.com/briefings/grok-4-20/xAI released Grok 4.20 on February 17, 2026. It gives xAI a new language option with API access, according to Epoch AI's catalog.Tue, 14 Jul 2026 12:00:00 GMT