Muse Spark 1.3 vs Doubao Seed 2.1 Turbo
Muse Spark 1.3 wins on Overall, Coding, Multimodal. Every numeric field is compared below, with a worked monthly-cost example and a pick rule for each use case.
Verdict at a glance
Choose Muse Spark 1.3 if you…
- #1 DeepSWE long-horizon coding
- Open weights, self-hostable
- Extremely low cost
- Fast
- Best for: Coding, Open-source deployment, Budget
Choose Doubao Seed 2.1 Turbo if you…
- Low price
- Video support
- Fast
- Built for volume
- Best for: Volume production, Video, Low cost
Head-to-head aggregate scores
Scores are 0–100, aggregated from public benchmark information and independently weighted across three leaderboards. Rank is out of 26 tracked models.
Aggregated from public sources and independently weighted; methodology on the Terms page. Scores within 3 points are treated as statistically tied.
Specs & pricing — every field side by side
List API prices in USD per 1M tokens. The highlighted cell is the stronger value/capability on that row.
| Dimension | Muse Spark 1.3 | Doubao Seed 2.1 Turbo | Verdict |
|---|---|---|---|
| Vendor | Meta (US) | ByteDance (CN) | Different vendors |
| Released | 2026.09 | 2026.06 | Muse Spark 1.3 is newer |
| Overall (rank) | 64 · #22 | 63 · #24 | Muse Spark 1.3 +1 |
| Coding | 88 · #5 | 61 · #23 | Muse Spark 1.3 +27 |
| Multimodal | 76 · #17 | 73 · #21 | Muse Spark 1.3 +3 |
| Context window | 256K | 256K | Tie |
| Max output | 64K | 256K | Muse Spark 1.3 longer |
| Effective-context | 85 | 90 | Doubao Seed 2.1 Turbo more reliable |
| Input $/1M | $1.25 | $0.42 | Doubao Seed 2.1 Turbo cheaper |
| Output $/1M | $4.25 | $2.08 | Doubao Seed 2.1 Turbo cheaper |
| Cache discount | none | custom | Doubao Seed 2.1 Turbo deeper |
| Speed | ~70 tok/s | ~75 tok/s | Doubao Seed 2.1 Turbo faster |
| TTFT | 0.4s | 0.4s | Tie |
| Function calling | 72 | 80 | Doubao Seed 2.1 Turbo ahead |
| Refusal rate | ~4% | ~10% | Muse Spark 1.3 less restrictive |
| English | 84 | 68 | Muse Spark 1.3 |
| Chinese | 62 | 90 | Doubao Seed 2.1 Turbo |
| Modalities | text, image | text, image, video | different coverage |
| Open weights | Yes | No | Muse Spark 1.3 is open |
| Fine-tuning | Yes | Yes | |
| Free tier | Open weights free to self-host; hosted API at $1.25/$4.25 per 1M | Doubao App free | |
| SOC2 / no-train | no / yes | no / yes | |
| Private deployment | Yes | Yes | Both support it |
Fields drawn from vendor public documentation and the Modelspectra 26-model dataset; speed varies with network, concurrency and prompt length. Verify current pricing before purchase.
Dimension-by-dimension analysis
Reasoning & overall intelligence
Muse Spark 1.3 leads the overall aggregate by 1 points (64 vs 63). That is a meaningful, not marginal, edge on hard, multi-step reasoning, while Doubao Seed 2.1 Turbo remains a strong generalist that is not out of its depth on routine work.
Agentic coding
This is a decisive gap: Muse Spark 1.3 scores 88 against 61. On multi-file edits, SWE-style tickets and long-horizon agent loops Muse Spark 1.3 needs fewer correction turns; Doubao Seed 2.1 Turbo is still competent for scripts and assisted completion but trails as task complexity rises.
Multimodal
Muse Spark 1.3 leads multimodal 76 vs 73. A concrete modality difference: Doubao Seed 2.1 Turbo additionally handles video.
Speed & latency
Doubao Seed 2.1 Turbo is faster in interactive use: ~75 tok/s with 0.4s TTFT versus ~70 tok/s with 0.4s TTFT (about 1.1× the throughput). For conversational UIs where perceived responsiveness drives retention, that edge is a real product factor even when raw reasoning is lower.
Context: window vs usable recall
Nominal windows are 256K for Muse Spark 1.3 and 256K for Doubao Seed 2.1 Turbo. Crucially, the larger nominal window does not win on usable recall: Muse Spark 1.3 advertises 256K but Doubao Seed 2.1 Turbo scores higher on effective-context (90 vs 85), i.e. it actually retains more of what it was given.
Price & total cost
Doubao Seed 2.1 Turbo is the cheaper API at $0.42/$2.08 versus Muse Spark 1.3 at $1.25/$4.25 per 1M input/output tokens — list input is about 3.0× lower.
Chinese vs English
English: Muse Spark 1.3 84 vs Doubao Seed 2.1 Turbo 68. Chinese: 62 vs 90. For Chinese-language production, Doubao Seed 2.1 Turbo is the stronger pick. Note that non-Chinese models generally require overseas network access for their APIs.
Tool use & ecosystem
Function-calling score: Muse Spark 1.3 72 vs Doubao Seed 2.1 Turbo 80, so Doubao Seed 2.1 Turbo has the edge on structured tool use. Fine-tuning is available from Muse Spark 1.3 and Doubao Seed 2.1 Turbo. Factor in existing SDK/plugin familiarity — switching cost often outweighs a few-point tool-use gap.
Cost worked example — same workload, real token math
Assume a production workload of 100M input + 30M output tokens per month, with 90% of input tokens served from cache. Figures use public list prices.
| Scenario · per month | Muse Spark 1.3 | Doubao Seed 2.1 Turbo | Gap |
|---|---|---|---|
| List priceno cache applied | $252100M in × $1.25 + 30M out × $4.25 | $104100M in × $0.42 + 30M out × $2.08 | 2.42×gap |
| With caching90% of inputs cache-hit | $252no published cache discount | $104no published cache discount | 2.42×gap |
Illustrative model; your input/output mix and cache-hit ratio change the result. Prices are list rates before any enterprise agreement.