Doubao Pro 256K vs Hunyuan Hy3 Preview
Doubao Pro 256K (2024) and Hunyuan Hy3 Preview (2026) are frontier reasoning models from ByteDance and Tencent AI Lab. Doubao Pro 256K ships a 256k-token context window, while Hunyuan Hy3 Preview ships a 262k-token context window. On pricing, Hunyuan Hy3 Preview costs $0.07/1M input tokens versus $0.73/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Hunyuan Hy3 Preview is ~1014% cheaper at $0.07/1M; pay for Doubao Pro 256K only for provider fit.
Decision scorecard
Local evidence first| Signal | Doubao Pro 256K | Hunyuan Hy3 Preview |
|---|---|---|
| Best for | general production evaluation | reasoning-heavy apps, tool-calling agents, and provider-routed production |
| Decision fit | Long context | Coding, RAG, and Agents |
| Context window | 256k | 262k |
| Cheapest output | $1.32/1M tokens | $0.26/1M tokens |
| Provider routes | 1 tracked | 2 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Local decision data tags Doubao Pro 256K for Long context.
- Hunyuan Hy3 Preview has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Hunyuan Hy3 Preview has the lower cheapest tracked output price at $0.26/1M tokens.
- Hunyuan Hy3 Preview has broader tracked provider coverage for fallback and procurement flexibility.
- Hunyuan Hy3 Preview uniquely exposes Reasoning, Function calling, and Tool use in local model data.
- Local decision data tags Hunyuan Hy3 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.
Doubao Pro 256K
$919
Cheapest tracked route/tier: Volcengine
Hunyuan Hy3 Preview
$118
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $801. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Doubao Pro 256K and Hunyuan Hy3 Preview; plan for SDK, billing, or endpoint changes.
- Hunyuan Hy3 Preview is $1.06/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Hunyuan Hy3 Preview adds Reasoning, Function calling, and Tool use in local capability data.
- No overlapping tracked provider route is sourced for Hunyuan Hy3 Preview and Doubao Pro 256K; plan for SDK, billing, or endpoint changes.
- Doubao Pro 256K is $1.06/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Reasoning, Function calling, and Tool use before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-05-15 | 2026-04-22 |
| Context window | 256k | 262k |
| Parameters | — | 295B |
| Architecture | decoder only | dense moe hybrid |
| License | Proprietary | Tencent Hunyuan Community License |
| Openness | Proprietary | Open weights |
| Commercial use | Commercial use with conditions | Commercial use with conditions |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Doubao Pro 256K | Hunyuan Hy3 Preview |
|---|---|---|
| Input price | $0.73/1M tokens | $0.07/1M tokens |
| Output price | $1.32/1M tokens | $0.26/1M tokens |
| Providers |
Capabilities
| Capability | Doubao Pro 256K | Hunyuan Hy3 Preview |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | Yes |
| Function calling | No | Yes |
| Tool use | No | Yes |
| 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: Hunyuan Hy3 Preview, function calling: Hunyuan Hy3 Preview, and tool use: Hunyuan Hy3 Preview. Both models share the core language-model surface, 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, Doubao Pro 256K lists $0.73/1M input and $1.32/1M output tokens on the cheapest tracked provider, while Hunyuan Hy3 Preview lists $0.07/1M input and $0.26/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Hunyuan Hy3 Preview lower by about $0.79 per million blended tokens. Availability is 1 providers versus 2, so concentration risk also matters.
Choose Doubao Pro 256K when provider fit are central to the workload. Choose Hunyuan Hy3 Preview when reasoning depth, 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. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions.
FAQ
Which has a larger context window, Doubao Pro 256K or Hunyuan Hy3 Preview?
Hunyuan Hy3 Preview supports 262k tokens, while Doubao Pro 256K 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, Doubao Pro 256K or Hunyuan Hy3 Preview?
Hunyuan Hy3 Preview is cheaper on tracked token pricing. Doubao Pro 256K costs $0.73/1M input and $1.32/1M output tokens. Hunyuan Hy3 Preview costs $0.07/1M input and $0.26/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Doubao Pro 256K or Hunyuan Hy3 Preview open source?
Doubao Pro 256K is listed under Proprietary. Hunyuan Hy3 Preview is listed under Tencent Hunyuan Community License. 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 reasoning mode, Doubao Pro 256K or Hunyuan Hy3 Preview?
Hunyuan Hy3 Preview has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for function calling, Doubao Pro 256K or Hunyuan Hy3 Preview?
Hunyuan Hy3 Preview has the clearer documented function calling signal in this comparison. If function calling is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Doubao Pro 256K and Hunyuan Hy3 Preview?
Doubao Pro 256K is available on Volcengine. Hunyuan Hy3 Preview is available on OpenRouter and Tencent Cloud TI Platform. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-06-07. Data sourced from public model cards and provider documentation.