ByteDance Doubao Seed 2.0 Pro vs Nano Banana 2 (Gemini 3.1 Flash Image)
ByteDance Doubao Seed 2.0 Pro (2026) and Nano Banana 2 (Gemini 3.1 Flash Image) (2026) are frontier reasoning models from ByteDance and Google DeepMind. ByteDance Doubao Seed 2.0 Pro ships a 256k-token context window, while Nano Banana 2 (Gemini 3.1 Flash Image) ships a 131k-token context window. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Nano Banana 2 (Gemini 3.1 Flash Image) is safer overall; choose ByteDance Doubao Seed 2.0 Pro when long-context analysis matters.
Decision scorecard
Local evidence first| Signal | ByteDance Doubao Seed 2.0 Pro | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Best for | multimodal apps and tool-calling agents | reasoning-heavy apps and multimodal apps |
| Decision fit | Coding, RAG, and Agents | Long context and Vision |
| Context window | 256k | 131k |
| Cheapest output | $2.37/1M tokens | $60/1M tokens |
| Provider routes | 1 tracked | 1 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- ByteDance Doubao Seed 2.0 Pro has the larger context window for long prompts, retrieval packs, or transcript analysis.
- ByteDance Doubao Seed 2.0 Pro has the lower cheapest tracked output price at $2.37/1M tokens.
- ByteDance Doubao Seed 2.0 Pro uniquely exposes Function calling in local model data.
- Local decision data tags ByteDance Doubao Seed 2.0 Pro for Coding, RAG, and Agents.
- Nano Banana 2 (Gemini 3.1 Flash Image) uniquely exposes Reasoning in local model data.
- Local decision data tags Nano Banana 2 (Gemini 3.1 Flash Image) for Long context and Vision.
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
Nano Banana 2 (Gemini 3.1 Flash Image)
$15,400
Cheapest tracked route/tier: Google AI Studio
Estimated monthly gap: $14,432. 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 Nano Banana 2 (Gemini 3.1 Flash Image); plan for SDK, billing, or endpoint changes.
- Nano Banana 2 (Gemini 3.1 Flash Image) is $57.63/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Function calling before moving production traffic.
- Nano Banana 2 (Gemini 3.1 Flash Image) adds Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Nano Banana 2 (Gemini 3.1 Flash Image) and ByteDance Doubao Seed 2.0 Pro; plan for SDK, billing, or endpoint changes.
- ByteDance Doubao Seed 2.0 Pro is $57.63/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning before moving production traffic.
- ByteDance Doubao Seed 2.0 Pro adds Function calling in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-02-14 | 2026-05-28 |
| Context window | 256k | 131k |
| Parameters | — | — |
| Architecture | - | decoder only |
| License | Proprietary | Proprietary |
| Knowledge cutoff | - | 2025-01 |
Pricing and availability
| Pricing attribute | ByteDance Doubao Seed 2.0 Pro | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Input price | $0.47/1M tokens | $0.50/1M tokens |
| Output price | $2.37/1M tokens | $60/1M tokens |
| Providers |
Capabilities
| Capability | ByteDance Doubao Seed 2.0 Pro | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|
| Vision | Yes | Yes |
| Multimodal | Yes | Yes |
| Reasoning | No | Yes |
| Function calling | Yes | No |
| Tool use | No | No |
| Structured outputs | No | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on reasoning mode: Nano Banana 2 (Gemini 3.1 Flash Image) and function calling: ByteDance Doubao Seed 2.0 Pro. Both models share vision and multimodal input, 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 Nano Banana 2 (Gemini 3.1 Flash Image) lists $0.50/1M input and $60/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts ByteDance Doubao Seed 2.0 Pro lower by about $17.31 per million blended tokens. Availability is 1 providers versus 1, so concentration risk also matters.
Choose ByteDance Doubao Seed 2.0 Pro when long-context analysis, larger context windows, and lower input-token cost are central to the workload. Choose Nano Banana 2 (Gemini 3.1 Flash Image) when reasoning depth 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 Nano Banana 2 (Gemini 3.1 Flash Image)?
ByteDance Doubao Seed 2.0 Pro supports 256k tokens, while Nano Banana 2 (Gemini 3.1 Flash Image) supports 131k 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 Nano Banana 2 (Gemini 3.1 Flash Image)?
ByteDance Doubao Seed 2.0 Pro is cheaper on tracked token pricing. ByteDance Doubao Seed 2.0 Pro costs $0.47/1M input and $2.37/1M output tokens. Nano Banana 2 (Gemini 3.1 Flash Image) costs $0.50/1M input and $60/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is ByteDance Doubao Seed 2.0 Pro or Nano Banana 2 (Gemini 3.1 Flash Image) open source?
ByteDance Doubao Seed 2.0 Pro is listed under Proprietary. Nano Banana 2 (Gemini 3.1 Flash Image) 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 Nano Banana 2 (Gemini 3.1 Flash Image)?
Both ByteDance Doubao Seed 2.0 Pro and Nano Banana 2 (Gemini 3.1 Flash Image) 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 Nano Banana 2 (Gemini 3.1 Flash Image)?
Both ByteDance Doubao Seed 2.0 Pro and Nano Banana 2 (Gemini 3.1 Flash Image) 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 Nano Banana 2 (Gemini 3.1 Flash Image)?
ByteDance Doubao Seed 2.0 Pro is available on Volcengine. Nano Banana 2 (Gemini 3.1 Flash Image) is available on Google AI Studio. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-05-31. Data sourced from public model cards and provider documentation.