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Muse Spark 1.3 vs Gemini 3.8 Flash
Of the 4 public leaderboards that rate both, Muse Spark 1.3 scores higher on 2 and Gemini 3.8 Flash on 2. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Muse Spark 1.3 is at 61.6 and Gemini 3.8 Flash at 43.7 (out of 100). On each maker's API, Muse Spark 1.3 costs $1.25 / $4.25 per 1M tokens (input / output) and Gemini 3.8 Flash $0.75 / $3.75.
Scores as published by each board; table composed November 10, 2026.
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Leaderboard by leaderboard
| Board | Muse Spark 1.3 | Gemini 3.8 Flash | Higher |
|---|---|---|---|
| LMArena Elo (community votes) | 1,654.3 | 1,583.8 | Muse Spark 1.3 |
| LiveBench global average (0-100) | 68.4 | 56 | Muse Spark 1.3 |
| SimpleBench AVG@5 % (private set) | 81.8 | 82.4 | Gemini 3.8 Flash |
| Epoch AI Epoch Capabilities Index (ECI) · many benchmarks on one scale | 158 | 158.7 | Gemini 3.8 Flash |
Raw scores are each board's own scale, so compare within a row, not across rows. Full table: the bench index.
For coding
On the ArtificialWatch coding index, Muse Spark 1.3 is at 76.2 (#10 of 47) and Gemini 3.8 Flash at 40.8 (#26). Muse Spark 1.3 scores higher on 2 of the 3 coding boards that rate both and Gemini 3.8 Flash on 1.
| Coding board | Muse Spark 1.3 | Gemini 3.8 Flash |
|---|---|---|
| LMArena · Coding | 1,507.9 | 1,510.6 |
| LiveBench · Coding | 83.1 | 65.7 |
| Vals Vibe Code Bench | 85.9 | 78.7 |
Muse Spark 1.3 at a glance
- Developer
- Meta
- Status
- Live since September 2, 2026
- API price
- $1.25 input / $4.25 output per 1M tokens · Meta, muse-spark-1.3
- Context window
- 1.05M tokens
Live — Sep 2 · $1.25/$4.25 per 1M and 1M ctx, identical to 1.2 · Meta: ~20% fewer tool calls, ~25% fewer tokens vs 1.2 · open weights on the roadmap, undated · the open-weights Spark shipped Oct 15 as Muse Spark Open (its own entry).
Muse Spark 1.3 is out — same price as 1.2, and the radar called it in 61 seconds
2026-09-03 · Meta released Muse Spark 1.3 today. Its own words: "We're excited to release Muse Spark 1.3, which delivers improved performance across agentic and coding tasks." The numbers Meta gives are efficiency, not capability: ~20% fewer tool calls and ~25% fewer tokens than 1.2 on coding work, fewer interaction turns, less…
Gemini 3.8 Flash at a glance
- Developer
- Status
- Live since September 2, 2026
- API price
- $0.75 input / $3.75 output per 1M tokens · Google, gemini-3.8-flash
- Context window
- 1.05M tokens
Live — GA Sep 2 · $0.75/$3.75 per 1M introductory through Dec 31, identical to 3.7 · 1M in / 64K out · 'our most intelligent Flash model' · 20 days after 3.7.
Gemini 3.8 Flash is GA — same price as 3.7, twenty days later
2026-09-02 · Google released Gemini 3.8 Flash today. The Gemini API changelog for September 2 reads: "Gemini 3.8 Flash generally available (GA): Released gemini-3.8-flash, our most intelligent Flash model, engineered for long-horizon software engineering, autonomous agents, and complex enterprise workflows."
Muse Spark 1.3 vs Gemini 3.8 Flash: quick answers
Which is better, Muse Spark 1.3 or Gemini 3.8 Flash?
It depends on what you measure. Of the 4 public leaderboards that rate both, Muse Spark 1.3 scores higher on 2 and Gemini 3.8 Flash on 2. Muse Spark 1.3's widest lead is on LiveBench; Gemini 3.8 Flash's widest lead is on SimpleBench. On the ArtificialWatch Index, which takes the median of each model's percentile across the boards that score it, Muse Spark 1.3 is at 61.6 and Gemini 3.8 Flash at 43.7 (out of 100).
Which is cheaper, Muse Spark 1.3 or Gemini 3.8 Flash?
Gemini 3.8 Flash is cheaper on both input and output. On each vendor's own API, Muse Spark 1.3 is $1.25 input / $4.25 output per million tokens and Gemini 3.8 Flash is $0.75 input / $3.75 output per million tokens. Prices as published in the models.dev catalog, as of 2026-11-10.
Which has the bigger context window, Muse Spark 1.3 or Gemini 3.8 Flash?
Neither. Both take 1.05M tokens.
How do Muse Spark 1.3 and Gemini 3.8 Flash compare for coding?
On the ArtificialWatch coding index, Muse Spark 1.3 is at 76.2 (#10 of 47) and Gemini 3.8 Flash at 40.8 (#26). Muse Spark 1.3 scores higher on 2 of the 3 coding boards that rate both and Gemini 3.8 Flash on 1.
Who makes Muse Spark 1.3 and Gemini 3.8 Flash?
Muse Spark 1.3 is from Meta; Gemini 3.8 Flash is from Google.
Where do these numbers come from?
Each score is the leaderboard's own published figure, read by ArtificialWatch (table composed November 10, 2026). Boards measure different things, so raw scores are only comparable within a row.
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Also: the bench index · API pricing · what a workload costs on each · the wire