Seed 2.0 Lite vs Grok 4.1 Fast
Too close to call on our weighted score (Seed 2.0 Lite 73, Grok 4.1 Fast 71). The right pick depends on what you value most.
ByteDance SeedSeed 2.0 Lite
73/100- ECI—
- Price$0.089 / $0.534
- Context256K
xAIGrok 4.1 Fast
71/100- ECI—
- Price$0.20 / $0.50
- Context2M
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Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within 2 points (Seed 2.0 Lite 73/100, Grok 4.1 Fast 71/100), so choose by what matters most for your work: Seed 2.0 Lite on price and Grok 4.1 Fast 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 priceSeed 2.0 LiteSeed 2.0 Lite $0.20 · Grok 4.1 Fast $0.275 per 1M tokens (3:1 blend)
- Longest contextGrok 4.1 FastGrok 4.1 Fast 2,000,000 · Seed 2.0 Lite 256,000 tokens
- Widest inputsSeed 2.0 LiteSeed 2.0 Lite: Text, Images, Video · Grok 4.1 Fast: Text, Images
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Seed 2.0 Lite | Grok 4.1 Fast |
|---|---|---|---|
| Price | 50% | 83 | 76 |
| Inputs & features | 30% | 80 | 60 |
| Context window | 20% | 36 | 72 |
| Overall | 100% | 73/100 | 71/100 |
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 | Seed 2.0 LiteByteDance Seed | Grok 4.1 FastxAI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.089 (best) | $0.20 |
| Output | $0.534 | $0.50 (best) |
| Cached input | $0.018 | — |
| Blended (3:1) | $0.20 (best) | $0.275 |
| Long-context rate | Over 32K: $0.134 / $0.802 | Same rate |
| Price source | Official Volcengine Ark API | Median of 2 providers |
| Limits | ||
| Context window | 256,000 tokens | 2,000,000 tokens (best) |
| Max output | 32,000 tokens (best) | 30,000 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | Yes | No |
| Reasoning | Yesminimal · low · medium · high · xhigh · max | No |
| Tool calling | Yes | Yes |
| Structured output | Yes | Yes |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | doubao-seed-2-0-lite-260428 | — |
| API providers | 6 (best) | 2 |
| Released | Feb 14, 2026 | Nov 19, 2025 |
| 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.
- Seed 2.0 Lite$1.96
- Grok 4.1 Fast$3.00
Which should you choose?
Which is better: Seed 2.0 Lite or Grok 4.1 Fast?
It is close. Our weighted score puts them within 2 points (Seed 2.0 Lite 73/100, Grok 4.1 Fast 71/100), so choose by what matters most for your work: Seed 2.0 Lite on price and Grok 4.1 Fast 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, Seed 2.0 Lite or Grok 4.1 Fast?
Seed 2.0 Lite is cheaper at $0.089 input / $0.534 output per million tokens (official Volcengine Ark API price). Grok 4.1 Fast costs $0.20 input / $0.50 output per million tokens (median across 2 API providers). At a typical mix of three input tokens to one output token, that is $0.20 per million tokens for Seed 2.0 Lite versus $0.275 for Grok 4.1 Fast (1.4× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Seed 2.0 Lite has not been scored yet and Grok 4.1 Fast has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Seed 2.0 Lite and Grok 4.1 Fast yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
Grok 4.1 Fast has the largest context window at 2,000,000 tokens, against 256,000 for Seed 2.0 Lite. Maximum output per response: Seed 2.0 Lite up to 32,000, Grok 4.1 Fast up to 30,000 tokens.
Which can read images, PDFs, audio or video?
Seed 2.0 Lite accepts text, images and video; Grok 4.1 Fast accepts text and images. Seed 2.0 Lite handles the widest range of inputs.
Are any of these open source?
No. Seed 2.0 Lite and Grok 4.1 Fast are proprietary and only available through APIs and apps.
Which is newer?
Seed 2.0 Lite is the newest, released Feb 14, 2026. Grok 4.1 Fast came out Nov 19, 2025.
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.
