Meta · Model release
Muse Spark 1.3: Meta's self-reported DeepSWE leader
Meta's frontier refresh claims the highest DeepSWE 1.1 score yet published (75.4%) at $1.25/$4.25 — but the headline config is not broadly available yet.
What changed
- 75.4% on DeepSWE 1.1 and 88.8% on Terminal-Bench 2.1, self-reported at 'max' thinking mode; a ~16-point DeepSWE jump over Spark 1.2.
- First-party API pricing of $1.25/$4.25 per MTok (cached $0.15) plus a $0.10/$0.20 contributor tier; 1M-token context.
- About 20% fewer tool calls and ~25% fewer tokens than Spark 1.2 in Meta's engineer comparisons.
Best fit
- Long-horizon coding agents
- Frontier quality below frontier pricing
- Meta ecosystem teams
What to be careful about
- The 'max' thinking mode behind the headline score is pending additional safety testing — verify which config you actually get.
- Closed weights, unlike Muse Spark 1.1; independent Datacurve results are not published yet.
Dataset snapshot: Muse Spark 1.3 is also represented in the checked comparison dataset. Prices and benchmark figures carry their own field dates.