Inkling vs Seed 2.1 Turbo: Specs & Benchmark Comparison
Inkling is developed by Thinking Machines Lab, while Seed 2.1 Turbo comes from ByteDance. Seed 2.1 Turbo was released in June 2026, and Inkling followed a month later in July 2026. Inkling has a published size of about 975 billion parameters; ByteDance has not disclosed the parameter count of Seed 2.1 Turbo.
The two models share 4 published benchmarks. Seed 2.1 Turbo leads on 4 of them. The widest gaps are on MMMU-Pro, where Seed 2.1 Turbo scores 82.2% against 73.5%; CharXiv-R, where Seed 2.1 Turbo scores 83.6% against 78.1%. Averaged across everything we track, Inkling sits at 61.8% and Seed 2.1 Turbo at 61.0%.
Inkling is available through an API at $0.95 per million input tokens with a 524K-token context window. We do not track a hosted API for Seed 2.1 Turbo, so pricing and context cannot be compared directly.
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| Characteristic | Inkling | Seed 2.1 Turbo |
|---|---|---|
| Company | Thinking Machines Lab | ByteDance |
| Release Date | July 21, 2026 | June 24, 2026 |
| Parameters | 975B | — |
| Multimodal | Yes | Yes |
| Context (input) | 524K | — |
| Context (output) | 524K | — |
| Input Price / 1M | $0.95 | — |
| Output Price / 1M | $4.05 | — |
| Average Score | 61.8% | 61.0% |
| Benchmarks | ||
| MMMU-Pro | 73.5% | 82.2% |
| CharXiv-R | 78.1% | 83.6% |
| MCP Atlas | 76.0% | 80.3% |
| Terminal-Bench 2.1 | 63.8% | 67.6% |
Visual Benchmark Comparison
Verdict
Inkling leads in 1 out of 2 comparison categories.
Both models show comparable average scores: Inkling — 0.6, Seed 2.1 Turbo — 0.6.
Inkling is newer: released 7/21/2026 vs 6/24/2026.
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Frequently Asked Questions
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The Inkling and Seed 2.1 Turbo 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 Seed 2.1 Turbo page. See also the complete list of AI model comparisons.