Updated for Week 45, 2026

Muse Spark 1.3 vs Gemini 3.8 Flash

On our Week 45, 2026 scores, Gemini 3.8 Flash edges ahead (85 vs 84). But Gemini 3.8 Flash is about 1.1x cheaper on output tokens than Muse Spark 1.3. That makes Gemini 3.8 Flash the clear pick for most people. Pick Muse Spark 1.3 for conversational quality. Pick Gemini 3.8 Flash for best quality per dollar.

Muse Spark 1.3Gemini 3.8 Flash
MakerMetaGoogle
ReleasedSeptember 2, 2026September 2, 2026
Price / 1M tokens$1.25 in / $4.25 out$0.75 in / $3.75 out
Open weightsNoNo
Best Value rank#11 (84)#9 (85)
Best for
  • Conversational quality
  • Creative writing
  • Budget-conscious builders
  • Best quality per dollar
  • Fast assistants
  • Apps with lots of traffic
Strengths
  • Muse Spark 1.3 Max scores 1493 on LMArena text
  • Contributor tier at $0.10 / $0.20
  • LMArena text score of 1493 (high effort)
  • Very cheap intro pricing
Watch out for
  • The Contributor tier's discount comes with data-sharing terms, so read them first
  • The price doubles on January 1, 2027

The short version

Muse Spark 1.3: Meta's Muse Spark line is one of the most-voted families on LMArena. Version 1.3 keeps the 1.2 price and also comes with a heavily discounted 'Contributor' tier.

Gemini 3.8 Flash: The surprise of the fall. Google's 'fast' model sits inside the LMArena text top 10, above Google's own Pro model.

Rankings change every week. Check the latest standings or swap in a different model.