Ornith 1.5 35B A3B vs Seed 2.1 Turbo
Too close to call on our weighted score (Ornith 1.5 35B A3B 59, Seed 2.1 Turbo 57). The right pick depends on what you value most.
DeepReinforce
Ornith 1.5 35B A3B
59/100- ECI—
- Price$0.20 / $1.70
- Context262K
ByteDance SeedSeed 2.1 Turbo
57/100- ECI—
- Price$0.445 / $2.23
- Context256K
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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 (Ornith 1.5 35B A3B 59/100, Seed 2.1 Turbo 57/100), so choose by what matters most for your work: Ornith 1.5 35B A3B on price and Ornith 1.5 35B A3B 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 priceOrnith 1.5 35B A3BOrnith 1.5 35B A3B $0.575 · Seed 2.1 Turbo $0.891 per 1M tokens (3:1 blend)
- Longest contextOrnith 1.5 35B A3BOrnith 1.5 35B A3B 262,144 · Seed 2.1 Turbo 256,000 tokens
- Widest inputsSeed 2.1 TurboOrnith 1.5 35B A3B: Text, Images · Seed 2.1 Turbo: Text, Images, Video
- Self-hostingOrnith 1.5 35B A3BPublishes downloadable weights (MIT)
| Measure | Weight | Ornith 1.5 35B A3B | Seed 2.1 Turbo |
|---|---|---|---|
| Price | 50% | 61 | 52 |
| Inputs & features | 30% | 70 | 80 |
| Context window | 20% | 37 | 36 |
| Overall | 100% | 59/100 | 57/100 |
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 | Ornith 1.5 35B A3BDeepReinforce | Seed 2.1 TurboByteDance Seed |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.20 (best) | $0.445 |
| Output | $1.70 (best) | $2.23 |
| Cached input | — | $0.089 |
| Blended (3:1) | $0.575 (best) | $0.891 |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 2 providers | Official Volcengine Ark API |
| Limits | ||
| Context window | 262,144 tokens (best) | 256,000 tokens |
| Max output | — | 256,000 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | No | Yes |
| Reasoning | Yes | Yesminimal · low · medium · high · xhigh · max |
| Tool calling | Yes | Yes |
| Structured output | Yes | Yes |
| Availability | ||
| Weights | OpenMIT | Proprietary |
| API model ID | — | doubao-seed-2-1-turbo-260628 |
| API providers | 2 | 4 (best) |
| Released | Aug 18, 2026 | Jun 23, 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.
- Ornith 1.5 35B A3B$5.40
- Seed 2.1 Turbo$8.91
Which should you choose?
Which is better: Ornith 1.5 35B A3B or Seed 2.1 Turbo?
It is close. Our weighted score puts them within 2 points (Ornith 1.5 35B A3B 59/100, Seed 2.1 Turbo 57/100), so choose by what matters most for your work: Ornith 1.5 35B A3B on price and Ornith 1.5 35B A3B 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, Ornith 1.5 35B A3B or Seed 2.1 Turbo?
Ornith 1.5 35B A3B is cheaper at $0.20 input / $1.70 output per million tokens (median across 2 API providers). Seed 2.1 Turbo costs $0.445 input / $2.23 output per million tokens (official Volcengine Ark API price). At a typical mix of three input tokens to one output token, that is $0.575 per million tokens for Ornith 1.5 35B A3B versus $0.891 for Seed 2.1 Turbo (1.5× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Ornith 1.5 35B A3B has not been scored yet and Seed 2.1 Turbo has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Ornith 1.5 35B A3B and Seed 2.1 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?
Ornith 1.5 35B A3B has the largest context window at 262,144 tokens, against 256,000 for Seed 2.1 Turbo. Maximum output per response: Seed 2.1 Turbo up to 256,000 tokens.
Which can read images, PDFs, audio or video?
Ornith 1.5 35B A3B accepts text and images; Seed 2.1 Turbo accepts text, images and video. Seed 2.1 Turbo handles the widest range of inputs.
Are any of these open source?
Ornith 1.5 35B A3B publishes its weights (MIT) and can be self-hosted; Seed 2.1 Turbo is proprietary.
Which is newer?
Ornith 1.5 35B A3B is the newest, released Aug 18, 2026. Seed 2.1 Turbo came out Jun 23, 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.
