Nex-N2-Pro vs Qwen3.5 122B-A10B vs Seed 2.1 Turbo
Too close to call on our weighted score (Qwen3.5 122B-A10B 58, Seed 2.1 Turbo 57, Nex-N2-Pro 53). The right pick depends on what you value most.
Nex AGI
Nex-N2-Pro
53/100- ECI—
- Price$0.50 / $2.50
- Context262K
Alibaba (Qwen)Qwen3.5 122B-A10B
58/100- ECI—
- Price$0.40 / $3.20
- Context262K
ByteDance SeedSeed 2.1 Turbo
57/100- ECI—
- Price$0.445 / $2.23
- Context256K
Too close to call
It is close. Our weighted score puts them within a point (Qwen3.5 122B-A10B 58/100, Seed 2.1 Turbo 57/100, Nex-N2-Pro 53/100), so choose by what matters most for your work: Seed 2.1 Turbo on price. 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 TurboSeed 2.1 Turbo $0.891 · Nex-N2-Pro $1.00 · Qwen3.5 122B-A10B $1.10 per 1M tokens (3:1 blend)
- Longest contextNex-N2-Pro and Qwen3.5 122B-A10BNex-N2-Pro 262,144 · Qwen3.5 122B-A10B 262,144 · Seed 2.1 Turbo 256,000 tokens
- Widest inputsQwen3.5 122B-A10BNex-N2-Pro: Text, Images · Qwen3.5 122B-A10B: Text, Images, Audio, Video · Seed 2.1 Turbo: Text, Images, Video
- Self-hostingNex-N2-Pro and Qwen3.5 122B-A10BPublishes downloadable weights
| Measure | Weight | Nex-N2-Pro | Qwen3.5 122B-A10B | Seed 2.1 Turbo |
|---|---|---|---|---|
| Price | 50% | 50 | 48 | 52 |
| Inputs & features | 30% | 70 | 90 | 80 |
| Context window | 20% | 37 | 37 | 36 |
| Overall | 100% | 53/100 | 58/100 | 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 | Nex-N2-ProNex AGI | Qwen3.5 122B-A10BAlibaba (Qwen) | Seed 2.1 TurboByteDance Seed |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $0.50 | $0.40 (best) | $0.445 |
| Output | $2.50 | $3.20 | $2.23 (best) |
| Cached input | — | — | $0.089 |
| Blended (3:1) | $1.00 | $1.10 | $0.891 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Median of 1 providers | Official Alibaba API | Official Volcengine Ark API |
| Limits | |||
| Context window | 262,144 tokens (best) | 262,144 tokens (best) | 256,000 tokens |
| Max output | 262,144 tokens (best) | 65,536 tokens | 256,000 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | No | No | No |
| Audio | No | Yes | No |
| Video | No | Yes | Yes |
| Reasoning | Yes | Yes | Yesminimal · low · medium · high · xhigh · max |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | Yes | Yes |
| Availability | |||
| Weights | Open | Open | Proprietary |
| API model ID | — | qwen3.5-122b-a10b | doubao-seed-2-1-turbo-260628 |
| API providers | 1 | 19 (best) | 4 |
| Released | Jun 2, 2026 | Feb 23, 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.
- Nex-N2-Pro$10.00
- Qwen3.5 122B-A10B$10.40
- Seed 2.1 Turbo$8.91
Which should you choose?
Which is better: Nex-N2-Pro, Qwen3.5 122B-A10B or Seed 2.1 Turbo?
It is close. Our weighted score puts them within a point (Qwen3.5 122B-A10B 58/100, Seed 2.1 Turbo 57/100, Nex-N2-Pro 53/100), so choose by what matters most for your work: Seed 2.1 Turbo on price. 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, Nex-N2-Pro, Qwen3.5 122B-A10B or Seed 2.1 Turbo?
Seed 2.1 Turbo is cheaper at $0.445 input / $2.23 output per million tokens (official Volcengine Ark API price). Nex-N2-Pro costs $0.50 input / $2.50 output per million tokens (median across 1 API provider); Qwen3.5 122B-A10B costs $0.40 input / $3.20 output per million tokens (official Alibaba API price). At a typical mix of three input tokens to one output token, that is $0.891 per million tokens for Seed 2.1 Turbo versus $1.00 for Nex-N2-Pro (1.1× as much) and $1.10 for Qwen3.5 122B-A10B (1.2× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Nex-N2-Pro has not been scored yet, Qwen3.5 122B-A10B 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 Nex-N2-Pro, Qwen3.5 122B-A10B and Seed 2.1 Turbo 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?
Nex-N2-Pro and Qwen3.5 122B-A10B have the largest context windows (262,144 and 262,144 tokens), against 256,000 for Seed 2.1 Turbo. Maximum output per response: Nex-N2-Pro up to 262,144, Qwen3.5 122B-A10B up to 65,536, Seed 2.1 Turbo up to 256,000 tokens.
Which can read images, PDFs, audio or video?
Nex-N2-Pro accepts text and images; Qwen3.5 122B-A10B accepts text, images, audio and video; Seed 2.1 Turbo accepts text, images and video. Qwen3.5 122B-A10B handles the widest range of inputs.
Are any of these open source?
Nex-N2-Pro and Qwen3.5 122B-A10B publishes its weights and can be self-hosted; Seed 2.1 Turbo is proprietary.
Which is newer?
Seed 2.1 Turbo is the newest, released Jun 23, 2026. Nex-N2-Pro came out Jun 2, 2026; Qwen3.5 122B-A10B came out Feb 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.
