ByteDance Doubao Seed 2.0 Pro vs Gemini 3.1 Flash-Lite
ByteDance Doubao Seed 2.0 Pro (2026) and Gemini 3.1 Flash-Lite (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 Flash-Lite ships a 1.05m-token context window. On Google-Proof Q&A, ByteDance Doubao Seed 2.0 Pro leads by 2 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 Flash-Lite is ~88% cheaper at $0.25/1M; pay for ByteDance Doubao Seed 2.0 Pro only for vision-heavy evaluation.
Decision scorecard
Local evidence first| Signal | ByteDance Doubao Seed 2.0 Pro | Gemini 3.1 Flash-Lite |
|---|---|---|
| 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 | 1.05m |
| Cheapest output | $2.37/1M tokens | $1.50/1M tokens |
| Provider routes | 1 tracked | 3 tracked |
| Shared benchmarks | Google-Proof Q&A leader | 1 rows |
Decision tradeoffs
- ByteDance Doubao Seed 2.0 Pro leads the largest shared benchmark signal on Google-Proof Q&A by 2 points.
- Local decision data tags ByteDance Doubao Seed 2.0 Pro for Coding, RAG, and Agents.
- Gemini 3.1 Flash-Lite has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Gemini 3.1 Flash-Lite has the lower cheapest tracked output price at $1.50/1M tokens.
- Gemini 3.1 Flash-Lite has broader tracked provider coverage for fallback and procurement flexibility.
- Gemini 3.1 Flash-Lite uniquely exposes Tool use, Structured outputs, and Code execution in local model data.
- Local decision data tags Gemini 3.1 Flash-Lite 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 Flash-Lite
$575
Cheapest tracked route/tier: Google AI Studio
Estimated monthly gap: $394. 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 Flash-Lite; plan for SDK, billing, or endpoint changes.
- Gemini 3.1 Flash-Lite is $0.87/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Gemini 3.1 Flash-Lite adds Tool use, Structured outputs, and Code execution in local capability data.
- No overlapping tracked provider route is sourced for Gemini 3.1 Flash-Lite and ByteDance Doubao Seed 2.0 Pro; plan for SDK, billing, or endpoint changes.
- ByteDance Doubao Seed 2.0 Pro is $0.87/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Tool use, Structured outputs, and Code execution before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-02-14 | 2026-05-07 |
| Context window | 256k | 1.05m |
| 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 Flash-Lite |
|---|---|---|
| Input price | $0.47/1M tokens | $0.25/1M tokens |
| Output price | $2.37/1M tokens | $1.50/1M tokens |
| Providers |
Capabilities
| Capability | ByteDance Doubao Seed 2.0 Pro | Gemini 3.1 Flash-Lite |
|---|---|---|
| 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 Flash-Lite |
|---|---|---|
| Google-Proof Q&A | 88.9 | 86.9 |
Deep dive
On shared benchmark coverage, Google-Proof Q&A has ByteDance Doubao Seed 2.0 Pro at 88.9 and Gemini 3.1 Flash-Lite at 86.9, with ByteDance Doubao Seed 2.0 Pro ahead by 2 points. The largest visible gap is 2 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 Flash-Lite, structured outputs: Gemini 3.1 Flash-Lite, and code execution: Gemini 3.1 Flash-Lite. 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 Flash-Lite lists $0.25/1M input and $1.50/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Gemini 3.1 Flash-Lite lower by about $0.42 per million blended tokens. Availability is 1 providers versus 3, so concentration risk also matters.
Choose ByteDance Doubao Seed 2.0 Pro when vision-heavy evaluation are central to the workload. Choose Gemini 3.1 Flash-Lite when coding workflow support, larger context windows, and lower input-token cost 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 Flash-Lite?
Gemini 3.1 Flash-Lite supports 1.05m 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 Flash-Lite?
Gemini 3.1 Flash-Lite is cheaper on tracked token pricing. ByteDance Doubao Seed 2.0 Pro costs $0.47/1M input and $2.37/1M output tokens. Gemini 3.1 Flash-Lite costs $0.25/1M input and $1.50/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is ByteDance Doubao Seed 2.0 Pro or Gemini 3.1 Flash-Lite open source?
ByteDance Doubao Seed 2.0 Pro is listed under Proprietary. Gemini 3.1 Flash-Lite 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 Flash-Lite?
Both ByteDance Doubao Seed 2.0 Pro and Gemini 3.1 Flash-Lite 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 Flash-Lite?
Both ByteDance Doubao Seed 2.0 Pro and Gemini 3.1 Flash-Lite 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 Flash-Lite?
ByteDance Doubao Seed 2.0 Pro is available on Volcengine. Gemini 3.1 Flash-Lite is available on Google AI Studio, OpenRouter, and Vercel AI Gateway. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-05-22. Data sourced from public model cards and provider documentation.