ByteDance Doubao Seed 2.0 Pro vs Gemini 3.1 Pro Preview
ByteDance Doubao Seed 2.0 Pro (2026) and Gemini 3.1 Pro Preview (2026) are general-purpose language models from ByteDance and Google DeepMind. ByteDance Doubao Seed 2.0 Pro ships a 256k-token context window, while Gemini 3.1 Pro Preview ships a 1m-token context window. On SWE-bench Verified, Gemini 3.1 Pro Preview leads by 4.1 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Gemini 3.1 Pro Preview is safer overall; choose ByteDance Doubao Seed 2.0 Pro when vision-heavy evaluation matters.
Decision scorecard
Local evidence first| Signal | ByteDance Doubao Seed 2.0 Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Best for | multimodal apps and tool-calling agents | multimodal apps, tool-calling agents, and long-context analysis |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 256k | 1m |
| Cheapest output | $2.37/1M tokens | $12/1M tokens |
| Provider routes | 1 tracked | 5 tracked |
| Shared benchmarks | 2 rows | SWE-bench Verified leader |
Decision tradeoffs
- ByteDance Doubao Seed 2.0 Pro has the lower cheapest tracked output price at $2.37/1M tokens.
- Local decision data tags ByteDance Doubao Seed 2.0 Pro for Coding, RAG, and Agents.
- Gemini 3.1 Pro Preview leads the largest shared benchmark signal on SWE-bench Verified by 4.1 points.
- Gemini 3.1 Pro Preview has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 3.1 Pro Preview has broader tracked provider coverage for fallback and procurement flexibility.
- Gemini 3.1 Pro Preview uniquely exposes Tool use, Structured outputs, and Code execution in local model data.
- Local decision data tags Gemini 3.1 Pro Preview for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
ByteDance Doubao Seed 2.0 Pro
$969
Cheapest tracked route/tier: Volcengine
Gemini 3.1 Pro Preview
$4,600
Cheapest tracked route/tier: Google AI Studio
Estimated monthly gap: $3,632. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for ByteDance Doubao Seed 2.0 Pro and Gemini 3.1 Pro Preview; plan for SDK, billing, or endpoint changes.
- Gemini 3.1 Pro Preview is $9.63/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Gemini 3.1 Pro Preview adds Tool use, Structured outputs, and Code execution in local capability data.
- No overlapping tracked provider route is sourced for Gemini 3.1 Pro Preview and ByteDance Doubao Seed 2.0 Pro; plan for SDK, billing, or endpoint changes.
- ByteDance Doubao Seed 2.0 Pro is $9.63/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Tool use, Structured outputs, and Code execution before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-02-14 | 2026-02-19 |
| Context window | 256k | 1m |
| Parameters | — | — |
| Architecture | - | decoder only |
| License | Proprietary | Proprietary |
| Knowledge cutoff | - | 2025-01 |
Pricing and availability
| Pricing attribute | ByteDance Doubao Seed 2.0 Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Input price | $0.47/1M tokens |
|
| Output price | $2.37/1M tokens |
|
| Providers |
Capabilities
| Capability | ByteDance Doubao Seed 2.0 Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | No |
| Function calling | Yes | Yes |
| Tool use | No | Yes |
| Structured outputs | No | Yes |
| Code execution | No | Yes |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | ByteDance Doubao Seed 2.0 Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| SWE-bench Verified | 76.5 | 80.6 |
| Google-Proof Q&A | 88.9 | 94.3 |
Deep dive
On shared benchmark coverage, SWE-bench Verified has ByteDance Doubao Seed 2.0 Pro at 76.5 and Gemini 3.1 Pro Preview at 80.6, with Gemini 3.1 Pro Preview ahead by 4.1 points; Google-Proof Q&A has ByteDance Doubao Seed 2.0 Pro at 88.9 and Gemini 3.1 Pro Preview at 94.3, with Gemini 3.1 Pro Preview ahead by 5.4 points. The largest visible gap is 5.4 points on Google-Proof Q&A, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on tool use: Gemini 3.1 Pro Preview, structured outputs: Gemini 3.1 Pro Preview, and code execution: Gemini 3.1 Pro Preview. Both models share vision, multimodal input, and function calling, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, ByteDance Doubao Seed 2.0 Pro lists $0.47/1M input and $2.37/1M output tokens on the cheapest tracked provider, while Gemini 3.1 Pro Preview lists tiered pricing: 0-200,001t is $2/1M input and $12/1M output; 200,001t+ is $4/1M input and $18/1M output. A 70/30 input-output blend puts ByteDance Doubao Seed 2.0 Pro lower by about $3.96 per million blended tokens. For tiered rows, this cheapest-track view can understate interactive or fast-lane spend, so compare the tier you will actually use. Availability is 1 providers versus 5, so concentration risk also matters.
Choose ByteDance Doubao Seed 2.0 Pro when vision-heavy evaluation and lower input-token cost are central to the workload. Choose Gemini 3.1 Pro Preview when coding workflow support, larger context windows, and broader provider choice are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, ByteDance Doubao Seed 2.0 Pro or Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview supports 1m tokens, while ByteDance Doubao Seed 2.0 Pro supports 256k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, ByteDance Doubao Seed 2.0 Pro or Gemini 3.1 Pro Preview?
ByteDance Doubao Seed 2.0 Pro lists $0.47/1M input and $2.37/1M output tokens on the cheapest tracked provider. Gemini 3.1 Pro Preview lists tiered pricing: 0-200,001t is $2/1M input and $12/1M output; 200,001t+ is $4/1M input and $18/1M output. Compare the tier you will actually use; cheap async pricing can overstate savings for interactive workflows. Provider discounts or batch pricing can still change the final bill.
Is ByteDance Doubao Seed 2.0 Pro or Gemini 3.1 Pro Preview open source?
ByteDance Doubao Seed 2.0 Pro is listed under Proprietary. Gemini 3.1 Pro Preview is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for vision, ByteDance Doubao Seed 2.0 Pro or Gemini 3.1 Pro Preview?
Both ByteDance Doubao Seed 2.0 Pro and Gemini 3.1 Pro Preview expose vision. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Which is better for multimodal input, ByteDance Doubao Seed 2.0 Pro or Gemini 3.1 Pro Preview?
Both ByteDance Doubao Seed 2.0 Pro and Gemini 3.1 Pro Preview expose multimodal input. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface.
Where can I run ByteDance Doubao Seed 2.0 Pro and Gemini 3.1 Pro Preview?
ByteDance Doubao Seed 2.0 Pro is available on Volcengine. Gemini 3.1 Pro Preview is available on Google AI Studio, GCP Vertex AI, OpenRouter, Replicate API, and Vercel AI Gateway. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-05-22. Data sourced from public model cards and provider documentation.