Inkling vs Muse Spark 1.3: Specs & Benchmark Comparison
Inkling is developed by Thinking Machines Lab, while Muse Spark 1.3 comes from Meta. Inkling was released in July 2026, and Muse Spark 1.3 followed 2 months later in September 2026. Inkling has a published size of about 975 billion parameters; Meta has not disclosed the parameter count of Muse Spark 1.3.
The two models share 2 published benchmarks. Muse Spark 1.3 leads on 2 of them. The widest gaps are on Terminal-Bench 2.1, where Muse Spark 1.3 scores 88.8% against 63.8%; GDPval-AA, where Muse Spark 1.3 scores 58.5% against 41.3%. Averaged across everything we track, Inkling sits at 61.8% and Muse Spark 1.3 at 73.4%.
Inkling is the cheaper API at $0.95 per million input tokens and $4.05 per million output tokens, about 32% below Muse Spark 1.3 at $1.25 and $4.25. Muse Spark 1.3 takes the larger context window at 1M tokens, compared with 524K for Inkling. Inkling accepts text, images, and audio as input, while Muse Spark 1.3 accepts text, images, audio, and video. On tooling, only Muse Spark 1.3 supports function calling and only Muse Spark 1.3 offers structured output.
| Characteristic | Inkling | Muse Spark 1.3 |
|---|---|---|
| Company | Thinking Machines Lab | Meta |
| Release Date | July 21, 2026 | September 2, 2026 |
| Parameters | 975B | — |
| Multimodal | Yes | Yes |
| Context (input) | 524K | 1.0M |
| Context (output) | 524K | 944K |
| Input Price / 1M | $0.95 | $1.25 |
| Output Price / 1M | $4.05 | $4.25 |
| Average Score | 61.8% | 73.4% |
| Benchmarks | ||
| Terminal-Bench 2.1 | 63.8% | 88.8% |
| GDPval-AA | 41.3% | 58.5% |
Visual Benchmark Comparison
Verdict
Muse Spark 1.3 leads in 2 out of 4 comparison categories.
Both models show comparable average scores: Inkling — 0.6, Muse Spark 1.3 — 0.7.
Inkling is 1.1x cheaper: input $0.95/1M vs $1.25/1M tokens.
Muse Spark 1.3 supports a larger context: 1M vs 524K tokens.
Muse Spark 1.3 is newer: released 9/2/2026 vs 7/21/2026.
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Frequently Asked Questions
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The Inkling and Muse Spark 1.3 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Inkling or Muse Spark 1.3 page. See also the complete list of AI model comparisons.