To be honest, I thought Anthropic's coding AI was pretty similar, but when I looked at the numbers, there was a clear difference.
In the real bug fixing benchmark called SWE-Bench Pro, Fable 5 is 80.3%. GPT-5.5 is 58.6% and Gemini 3.1 Pro is 54.2%, so it's quite a difference.
Muse Spark 1.3 — Meta launches the 4th model in the family in 5 months (released 02/09/2026).
Focus: long-horizon agentic + coding. arrives hours after Gemini 3.8 Flash, marking the September run. official search (
Gemini 3.8 flash can build, test, find its own mistakes, and fix them.
But the biggest upgrade isn’t speed. It’s what happens when you give it an entire workflow. What changed: → Plan → build → run → inspect → fix → test again → 3 thinking levels: Low, Medium, High →
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