Seed 2.1 Pro vs GLM-5V-Turbo
Too close to call on our weighted score (Seed 2.1 Pro 50, GLM-5V-Turbo 49). The right pick depends on what you value most.
ByteDance SeedSeed 2.1 Pro
50/100- ECI—
- Price$0.891 / $4.45
- Context256K
Z.ai (Zhipu)GLM-5V-Turbo
49/100- ECI—
- Price$1.20 / $4.00
- Context200K
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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 2.1 Pro 50/100, GLM-5V-Turbo 49/100), so choose by what matters most for your work: Seed 2.1 Pro on price and Seed 2.1 Pro 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 2.1 ProSeed 2.1 Pro $1.78 · GLM-5V-Turbo $1.90 per 1M tokens (3:1 blend)
- Longest contextSeed 2.1 ProSeed 2.1 Pro 256,000 · GLM-5V-Turbo 200,000 tokens
- Widest inputsGLM-5V-TurboSeed 2.1 Pro: Text, Images, Video · GLM-5V-Turbo: Text, Images, PDFs, Video
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Seed 2.1 Pro | GLM-5V-Turbo |
|---|---|---|---|
| Price | 50% | 38 | 37 |
| Inputs & features | 30% | 80 | 80 |
| Context window | 20% | 36 | 32 |
| Overall | 100% | 50/100 | 49/100 |
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 2.1 ProByteDance Seed | GLM-5V-TurboZ.ai (Zhipu) |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.891 (best) | $1.20 |
| Output | $4.45 | $4.00 (best) |
| Cached input | $0.178 (best) | $0.24 |
| Blended (3:1) | $1.78 (best) | $1.90 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Volcengine Ark API | Official Z.AI API |
| Limits | ||
| Context window | 256,000 tokens (best) | 200,000 tokens |
| Max output | 256,000 tokens (best) | 131,072 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | Yes |
| Audio | No | No |
| Video | Yes | Yes |
| Reasoning | Yesminimal · low · medium · high · xhigh · max | Yes |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | doubao-seed-2-1-pro-260628 | glm-5v-turbo |
| API providers | 2 | 14 (best) |
| Released | Jun 23, 2026 | Apr 1, 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.
- Seed 2.1 Pro$17.81
- GLM-5V-Turbo$20.00
Which should you choose?
Which is better: Seed 2.1 Pro or GLM-5V-Turbo?
It is close. Our weighted score puts them within 2 points (Seed 2.1 Pro 50/100, GLM-5V-Turbo 49/100), so choose by what matters most for your work: Seed 2.1 Pro on price and Seed 2.1 Pro 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 2.1 Pro or GLM-5V-Turbo?
Seed 2.1 Pro is cheaper at $0.891 input / $4.45 output per million tokens (official Volcengine Ark API price). GLM-5V-Turbo costs $1.20 input / $4.00 output per million tokens (official Z.AI API price). At a typical mix of three input tokens to one output token, that is $1.78 per million tokens for Seed 2.1 Pro versus $1.90 for GLM-5V-Turbo (1.1× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Seed 2.1 Pro has not been scored yet and GLM-5V-Turbo has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Seed 2.1 Pro and GLM-5V-Turbo 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?
Seed 2.1 Pro has the largest context window at 256,000 tokens, against 200,000 for GLM-5V-Turbo. Maximum output per response: Seed 2.1 Pro up to 256,000, GLM-5V-Turbo up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Seed 2.1 Pro accepts text, images and video; GLM-5V-Turbo accepts text, images, PDFs and video. GLM-5V-Turbo handles the widest range of inputs.
Are any of these open source?
No. Seed 2.1 Pro and GLM-5V-Turbo are proprietary and only available through APIs and apps.
Which is newer?
Seed 2.1 Pro is the newest, released Jun 23, 2026. GLM-5V-Turbo came out Apr 1, 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.
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