Seed 2.0 Code vs GPT-5.4 nano
GPT-5.4 nano comes out ahead, 63 to 57 on our weighted score, and it is the cheaper option too.
ByteDance SeedSeed 2.0 Code
57/100- ECI—
- Price$0.475 / $2.37
- Context262K
- Our pick
OpenAIGPT-5.4 nano
63/100- ECI145.8
- Price$0.20 / $1.25
- Context400K
Add a model
Make it a three-way comparison.
GPT-5.4 nano is our pick
GPT-5.4 nano is the better all-round choice, scoring 63/100 against Seed 2.0 Code (57). It leads on price and context window. Seed 2.0 Code wins on inputs & features. 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 priceGPT-5.4 nanoGPT-5.4 nano $0.463 · Seed 2.0 Code $0.95 per 1M tokens (3:1 blend)
- Longest contextGPT-5.4 nanoGPT-5.4 nano 400,000 · Seed 2.0 Code 262,144 tokens
- Widest inputsSeed 2.0 CodeSeed 2.0 Code: Text, Images, Video · GPT-5.4 nano: Text, Images
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Seed 2.0 Code | GPT-5.4 nano |
|---|---|---|---|
| Price | 50% | 51 | 66 |
| Inputs & features | 30% | 80 | 70 |
| Context window | 20% | 37 | 44 |
| Overall | 100% | 57/100 | 63/100 |
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 CodeByteDance Seed | GPT-5.4 nanoOpenAI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | 145.8 |
| ECI rank | — | #75 of 148 |
| GPQA DiamondGraduate-level science questions | — | 78.5% |
| FrontierMath Tiers 1–3Research-level mathematics | — | 44.9% |
| OTIS Mock AIME 2024–2025Competition mathematics | — | 87.8% |
| SimpleQA VerifiedShort factual questions | — | 11.7% |
| Price per million tokens | ||
| Input | $0.475 | $0.20 (best) |
| Output | $2.37 | $1.25 (best) |
| Cached input | $0.095 | $0.02 (best) |
| Blended (3:1) | $0.95 | $0.463 (best) |
| Long-context rate | Over 32K: $0.712 / $3.56 | Same rate |
| Price source | Official Volcengine Ark API | Official OpenAI API |
| Limits | ||
| Context window | 262,144 tokens | 400,000 tokens (best) |
| Max output | 131,072 tokens (best) | 128,000 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 | Yeslow · medium · high · xhigh |
| Tool calling | Yes | Yes |
| Structured output | Yes | Yes |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | doubao-seed-2-0-code-preview-260215 | gpt-5.4-nano |
| API providers | 10 | 26 (best) |
| Released | Feb 14, 2026 | Mar 17, 2026 |
| Knowledge cutoff | — | Aug 31, 2025 |
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 Code$9.50
- GPT-5.4 nano$4.50
Which should you choose?
Which is better: Seed 2.0 Code or GPT-5.4 nano?
GPT-5.4 nano is the better all-round choice, scoring 63/100 against Seed 2.0 Code (57). It leads on price and context window. Seed 2.0 Code wins on inputs & features. 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 Code or GPT-5.4 nano?
GPT-5.4 nano is cheaper at $0.20 input / $1.25 output per million tokens (official OpenAI API price). Seed 2.0 Code costs $0.475 input / $2.37 output per million tokens (official Volcengine Ark API price). At a typical mix of three input tokens to one output token, that is $0.463 per million tokens for GPT-5.4 nano versus $0.95 for Seed 2.0 Code (2.1× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Seed 2.0 Code has not been scored yet and GPT-5.4 nano has an ECI of 145.8.
Which is better for coding?
There are no published SWE-bench Verified results for Seed 2.0 Code and GPT-5.4 nano 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?
GPT-5.4 nano has the largest context window at 400,000 tokens, against 262,144 for Seed 2.0 Code. Maximum output per response: Seed 2.0 Code up to 131,072, GPT-5.4 nano up to 128,000 tokens.
Which can read images, PDFs, audio or video?
Seed 2.0 Code accepts text, images and video; GPT-5.4 nano accepts text and images. Seed 2.0 Code handles the widest range of inputs.
Are any of these open source?
No. Seed 2.0 Code and GPT-5.4 nano are proprietary and only available through APIs and apps.
Which is newer?
GPT-5.4 nano is the newest, released Mar 17, 2026. Seed 2.0 Code came out Feb 14, 2026. Knowledge cutoff: GPT-5.4 nano Aug 31, 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.
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