Hunyuan Hy3 Preview vs Kimi K2.5
Hunyuan Hy3 Preview (2026) and Kimi K2.5 (2026) compare a standalone API model against a coding-specialized model. Hunyuan Hy3 Preview ships a 262k-token context window, while Kimi K2.5 ships a 256k-token context window. On SWE-bench Verified, Kimi K2.5 leads by 2.4 pts. On pricing, Hunyuan Hy3 Preview costs $0.07/1M input tokens versus $0.44/1M for the alternative. This page treats the result as workflow and deployment fit, not a universal model winner.
Treat this as a product-type comparison: Hunyuan Hy3 Preview is standalone API model, while Kimi K2.5 is coding-specialized model. Choose based on workflow fit before reading any benchmark or price row as decisive.
Decision scorecard
Local evidence first| Signal | Hunyuan Hy3 Preview | Kimi K2.5 |
|---|---|---|
| Product type | Standalone API model | Coding-specialized model |
| Best for | reasoning-heavy apps, tool-calling agents, and provider-routed production | custom coding agents, code generation, and tool loops |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 262k | 256k |
| Cheapest output | $0.26/1M tokens | $2/1M tokens |
| Provider routes | 2 tracked | 10 tracked |
| Shared benchmarks | 4 shared | SWE-bench Verified leader |
Decision tradeoffs
- Hunyuan Hy3 Preview holds a shared-benchmark lead on BrowseComp, ahead by 6.5 points.
- 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 uniquely exposes Reasoning in local model data.
- Local decision data tags Hunyuan Hy3 Preview for Coding, RAG, and Agents.
- Kimi K2.5 holds a shared-benchmark lead on SWE-bench Verified, ahead by 2.4 points.
- Kimi K2.5 has broader tracked provider coverage for fallback and route flexibility.
- Kimi K2.5 uniquely exposes Vision, Multimodal, and Structured outputs in local model data.
- Local decision data tags Kimi K2.5 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.
Hunyuan Hy3 Preview
$118
Cheapest tracked route/tier: OpenRouter
Kimi K2.5
$852
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $734. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Kimi K2.5 is $1.74/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Reasoning before moving production traffic.
- Kimi K2.5 adds Vision, Multimodal, and Structured outputs in local capability data.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Hunyuan Hy3 Preview is $1.74/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Multimodal, and Structured outputs before moving production traffic.
- Hunyuan Hy3 Preview adds Reasoning in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-22 | 2026-03-15 |
| Context window | 262k | 256k |
| Parameters | 295B | 1T (MoE, 384 experts) |
| Architecture | Dense + MoE Hybrid | Mixture of Experts |
| License | Tencent Hunyuan Community License | Proprietary |
| Openness | Open weights | Proprietary |
| Weights | Available | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Hunyuan Hy3 Preview | Kimi K2.5 |
|---|---|---|
| Input price | $0.07/1M tokens | $0.44/1M tokens |
| Output price | $0.26/1M tokens | $2/1M tokens |
| Providers |
Capabilities
| Capability | Hunyuan Hy3 Preview | Kimi K2.5 |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | Yes | No |
| JSON / Tool use | Yes | Yes |
| Structured outputs | No | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Hunyuan Hy3 Preview | Kimi K2.5 |
|---|---|---|
| SWE-bench Verified | 74.4 | 76.8 |
| Google-Proof Q&A | 87.2 | 87.9 |
| BrowseComp | 67.1 | 60.6 |
| Terminal-Bench 2.0 | 54.4 | 50.8 |
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Last reviewed: 2026-06-29. Data sourced from public model cards and provider documentation.