Grok Build 0.1 vs Hy4 preview vs LongCat-2.5-Preview
Too close to call on our weighted score (Grok Build 0.1 54, LongCat-2.5-Preview 52, Hy4 preview 45). The right pick depends on what you value most.
xAIGrok Build 0.1
54/100- ECI—
- Price$1.00 / $2.00
- Context256K
TencentHy4 preview
45/100- ECI—
- Price$0.834 / $2.50
- Context1.02M
Meituan (LongCat)LongCat-2.5-Preview
52/100- ECI—
- Price$0.75 / $2.95
- Context1M
Too close to call
It is close. Our weighted score puts them within 2 points (Grok Build 0.1 54/100, LongCat-2.5-Preview 52/100, Hy4 preview 45/100), so choose by what matters most for your work: Grok Build 0.1 on price and Hy4 preview for long inputs. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceGrok Build 0.1Grok Build 0.1 $1.25 · Hy4 preview $1.25 · LongCat-2.5-Preview $1.30 per 1M tokens (3:1 blend)
- Longest contextHy4 previewHy4 preview 1,024,000 · LongCat-2.5-Preview 1,000,000 · Grok Build 0.1 256,000 tokens
- Widest inputsGrok Build 0.1Grok Build 0.1: Text, Images, PDFs · Hy4 preview: Text · LongCat-2.5-Preview: Text, Images
- Self-hostingHy4 previewPublishes downloadable weights
| Measure | Weight | Grok Build 0.1 | Hy4 preview | LongCat-2.5-Preview |
|---|---|---|---|---|
| Price | 50% | 45 | 45 | 44 |
| Inputs & features | 30% | 80 | 35 | 60 |
| Context window | 20% | 36 | 60 | 60 |
| Overall | 100% | 54/100 | 45/100 | 52/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Grok Build 0.1xAI | Hy4 previewTencent | LongCat-2.5-PreviewMeituan (LongCat) |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $1.00 | $0.834 | $0.75 (best) |
| Output | $2.00 (best) | $2.50 | $2.95 |
| Cached input | $0.20 | $0.042 (best) | — |
| Blended (3:1) | $1.25 (best) | $1.25 | $1.30 |
| Long-context rate | Over 200K: $2.00 / $4.00 | Same rate | Same rate |
| Price source | Official xAI API | Official Tencent TokenHub API | Median of 1 providers |
| Limits | |||
| Context window | 256,000 tokens | 1,024,000 tokens (best) | 1,000,000 tokens |
| Max output | 256,000 tokens (best) | 64,000 tokens | 131,072 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | No | Yes |
| PDFs | Yes | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yes | Yeshigh | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | No |
| Availability | |||
| Weights | Proprietary | Open | Proprietary |
| API model ID | grok-build-0.1 | hy4-preview | — |
| API providers | 19 (best) | 13 | 2 |
| Released | Apr 16, 2026 | Aug 28, 2026 | Sep 25, 2026 |
| Knowledge cutoff | — | — | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Grok Build 0.1$14.00
- Hy4 preview$13.34
- LongCat-2.5-Preview$13.40
Which should you choose?
Which is better: Grok Build 0.1, Hy4 preview or LongCat-2.5-Preview?
It is close. Our weighted score puts them within 2 points (Grok Build 0.1 54/100, LongCat-2.5-Preview 52/100, Hy4 preview 45/100), so choose by what matters most for your work: Grok Build 0.1 on price and Hy4 preview for long inputs. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Grok Build 0.1, Hy4 preview or LongCat-2.5-Preview?
Grok Build 0.1 is cheaper at $1.00 input / $2.00 output per million tokens (official xAI API price). Hy4 preview costs $0.834 input / $2.50 output per million tokens (official Tencent TokenHub API price); LongCat-2.5-Preview costs $0.75 input / $2.95 output per million tokens (median across 1 API provider). At a typical mix of three input tokens to one output token, that is $1.25 per million tokens for Grok Build 0.1 versus $1.25 for Hy4 preview (1× as much) and $1.30 for LongCat-2.5-Preview (1× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Grok Build 0.1 has not been scored yet, Hy4 preview has not been scored yet and LongCat-2.5-Preview has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Grok Build 0.1, Hy4 preview and LongCat-2.5-Preview yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
Hy4 preview has the largest context window at 1,024,000 tokens, against 1,000,000 for LongCat-2.5-Preview and 256,000 for Grok Build 0.1. Maximum output per response: Grok Build 0.1 up to 256,000, Hy4 preview up to 64,000, LongCat-2.5-Preview up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Grok Build 0.1 accepts text, images and PDFs; Hy4 preview accepts text; LongCat-2.5-Preview accepts text and images. Grok Build 0.1 handles the widest range of inputs.
Are any of these open source?
Hy4 preview publishes its weights and can be self-hosted; Grok Build 0.1 and LongCat-2.5-Preview is proprietary.
Which is newer?
LongCat-2.5-Preview is the newest, released Sep 25, 2026. Hy4 preview came out Aug 28, 2026; Grok Build 0.1 came out Apr 16, 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
