Muse Spark 1.3 at a glance.
From Meta's own pages, read Oct 20, 2026, so company-reported. A token is a word or part of a word. Prices can change; check the maker's page before you build on them.
- Made by
- MetaBased in US
- Released
- Not stated
- What it is for
- “Muse Spark 1.3 is trained for agentic workflows and optimized for competitive coding performance.”Meta for Developers: Muse Spark 1.3 model page, Oct 20, 2026 · in Meta's words
- Reads at once
- 1M tokensIts context window: how much text it can take in one go
- Takes in
- text, image, video, audio, pdf
- Download
- No, online only
$1.25per million tokens in$4.25per million tokens out
Model id muse-spark-1.3. Cached input $0.15. A 'contributor' variant (muse-spark-1.3-contributor), whose data Meta uses to improve its products, costs $0.10 in / $0.002 cached / $0.20 out.
Meta Model API docs: Pricing and rate limits, Oct 20, 2026 · company-reported
Where it ranks.
Its position on each of the 21 tests the models page uses, by testers other than the maker. Epoch AI's and Vectara's scores are shown under their open licenses; for LMArena, Scale and Vals we give the position and link to their own leaderboard. Each list is a snapshot with its date.
| Test | Rank | Score |
|---|---|---|
| Epoch Capabilities IndexEpoch AI, Oct 20, 2026 | #22 | 156.8range 154.89 to 158.88 |
| Vals IndexVals AI, Oct 19, 2026 | Not in the top 20 |
| Test | Rank | Score |
|---|---|---|
| LMArena WebDevLMArena, Oct 19, 2026 | #14 | On LMArena |
| SWE-Bench ProScale AI, Sep 22, 2026 | Not in the top 16 | |
| Vibe Code BenchVals AI, Oct 18, 2026 | #14 | On Vals AI |
| LMArena coding chatsLMArena, Oct 15, 2026 | #15 | On LMArena |
| Test | Rank | Score |
|---|---|---|
| LMArena textLMArena, Oct 15, 2026 | #10 | On LMArena |
| LMArena creative writingLMArena, Oct 15, 2026 | Not in the top 20 | |
| MultiChallengeScale AI, Feb 3, 2026 | Not in the top 15 |
| Test | Rank | Score |
|---|---|---|
| LMArena Agent ArenaLMArena, Oct 19, 2026 | #16 | On LMArena |
| Remote Labor IndexScale AI | Not in the top 16 | |
| Terminal-Bench 4.0Vals AI, Oct 19, 2026 | Not in the top 20 | |
| CUA-bench (games)Vals AI, Oct 13, 2026 | #7 | On Vals AI |
| Test | Rank | Score |
|---|---|---|
| LMArena mathLMArena, Oct 15, 2026 | #11 | On LMArena |
| Humanity's Last ExamScale AI | #12 | On Scale AI |
| ProofBenchVals AI, Oct 12, 2026 | Not in the top 20 |
| Test | Rank | Score |
|---|---|---|
| LMArena visionLMArena, Oct 19, 2026 | #13 | On LMArena |
| LMArena documentsLMArena, Sep 13, 2026 | #15 | On LMArena |
| Test | Rank | Score |
|---|---|---|
| GPQA DiamondVals AI, Sep 1, 2026 | Not in the top 20 | |
| MMMU ProVals AI, Sep 1, 2026 | Not in the top 20 |
| Test | Rank | Score |
|---|---|---|
| Vectara hallucination testVectara, Oct 16, 2026 | Not in our copy of the list |
“Not in the top” means it isn't among the models in our copy of that list, which runs to the position shown; it may not have been tested. Vectara's test ranks by how rarely a model adds facts, so lower is better. Positions can be shared when scores tie. Epoch's range is its margin of uncertainty. Epoch AI and Vectara data: CC BY 4.0 and Apache-2.0.
Our note: Release date not found on a Meta page we could read (news coverage points to early September 2026, not verified on a primary or listed trusted source). Meta docs say audio understanding in Muse Spark 1.3 'is not fully supported' and recommend Muse Spark 1.2 for audio.