Nemotron 3 Nano Omni 30B A3B Reasoning vs Step 3.5 Flash 2603
Nemotron 3 Nano Omni 30B A3B Reasoning comes out ahead, 69 to 62 on our weighted score, though Step 3.5 Flash 2603 is 2.7× cheaper per token.
- Our pick
NVIDIANemotron 3 Nano Omni 30B A3B Reasoning
69/100- ECI—
- Price$0.25 / $0.85
- Context256K
StepFunStep 3.5 Flash 2603
62/100- ECI—
- Price$0.10 / $0.30
- Context256K
Add a model
Make it a three-way comparison.
Nemotron 3 Nano Omni 30B A3B Reasoning is our pick
Nemotron 3 Nano Omni 30B A3B Reasoning is the better all-round choice, scoring 69/100 against Step 3.5 Flash 2603 (62). It leads on inputs & features. Step 3.5 Flash 2603 wins 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 priceStep 3.5 Flash 2603Step 3.5 Flash 2603 $0.15 · Nemotron 3 Nano Omni 30B A3B Reasoning $0.40 per 1M tokens (3:1 blend)
- Longest contextAbout the sameNemotron 3 Nano Omni 30B A3B Reasoning 256,000 · Step 3.5 Flash 2603 256,000 tokens
- Widest inputsNemotron 3 Nano Omni 30B A3B ReasoningNemotron 3 Nano Omni 30B A3B Reasoning: Text, Images, Audio, Video · Step 3.5 Flash 2603: Text
- Self-hostingAll open weightsEvery model here can be downloaded and run on your own hardware
| Measure | Weight | Nemotron 3 Nano Omni 30B A3B Reasoning | Step 3.5 Flash 2603 |
|---|---|---|---|
| Price | 50% | 69 | 89 |
| Inputs & features | 30% | 90 | 35 |
| Context window | 20% | 36 | 36 |
| Overall | 100% | 69/100 | 62/100 |
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 | Nemotron 3 Nano Omni 30B A3B ReasoningNVIDIA | Step 3.5 Flash 2603StepFun |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.25 | $0.10 (best) |
| Output | $0.85 | $0.30 (best) |
| Cached input | — | $0.02 |
| Blended (3:1) | $0.40 | $0.15 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 4 providers | Official StepFun (Global) API |
| Limits | ||
| Context window | 256,000 tokens | 256,000 tokens |
| Max output | 65,536 tokens | 256,000 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | No |
| PDFs | No | No |
| Audio | Yes | No |
| Video | Yes | No |
| Reasoning | Yes | Yeslow · high |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Open | Open |
| API model ID | nvidia/nemotron-3-nano-omni-30b-a3b-reasoning | step-3.5-flash-2603 |
| API providers | 8 (best) | 3 |
| Released | Apr 28, 2026 | Apr 2, 2026 |
| Knowledge cutoff | — | Jan 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Nemotron 3 Nano Omni 30B A3B Reasoning$4.20
- Step 3.5 Flash 2603$1.60
Which should you choose?
Which is better: Nemotron 3 Nano Omni 30B A3B Reasoning or Step 3.5 Flash 2603?
Nemotron 3 Nano Omni 30B A3B Reasoning is the better all-round choice, scoring 69/100 against Step 3.5 Flash 2603 (62). It leads on inputs & features. Step 3.5 Flash 2603 wins 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, Nemotron 3 Nano Omni 30B A3B Reasoning or Step 3.5 Flash 2603?
Step 3.5 Flash 2603 is cheaper at $0.10 input / $0.30 output per million tokens (official StepFun (Global) API price). Nemotron 3 Nano Omni 30B A3B Reasoning costs $0.25 input / $0.85 output per million tokens (median across 4 API providers; free on Nvidia). At a typical mix of three input tokens to one output token, that is $0.15 per million tokens for Step 3.5 Flash 2603 versus $0.40 for Nemotron 3 Nano Omni 30B A3B Reasoning (2.7× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Nemotron 3 Nano Omni 30B A3B Reasoning has not been scored yet and Step 3.5 Flash 2603 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Nemotron 3 Nano Omni 30B A3B Reasoning and Step 3.5 Flash 2603 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?
Nemotron 3 Nano Omni 30B A3B Reasoning and Step 3.5 Flash 2603 share the same 256,000-token context window. Maximum output per response: Nemotron 3 Nano Omni 30B A3B Reasoning up to 65,536, Step 3.5 Flash 2603 up to 256,000 tokens.
Which can read images, PDFs, audio or video?
Nemotron 3 Nano Omni 30B A3B Reasoning accepts text, images, audio and video; Step 3.5 Flash 2603 accepts text. Nemotron 3 Nano Omni 30B A3B Reasoning handles the widest range of inputs.
Are any of these open source?
Yes, both publish their weights, so you can self-host them.
Which is newer?
Nemotron 3 Nano Omni 30B A3B Reasoning is the newest, released Apr 28, 2026. Step 3.5 Flash 2603 came out Apr 2, 2026. Knowledge cutoff: Step 3.5 Flash 2603 Jan 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.
Related comparisons
- Add Trinity Large ThinkingThree-way comparison
- Nemotron 3 Nano Omni 30B A3B Reasoning vs Trinity Large ThinkingArcee AI
- Nemotron 3 Nano Omni 30B A3B Reasoning vs Step 3.7 FlashStepFun
- Nemotron 3 Nano Omni 30B A3B Reasoning vs Mercury Edit 2Inception
- Nemotron 3 Nano Omni 30B A3B Reasoning vs MiMo-V2.5-ProXiaomi
- Step 3.5 Flash 2603 vs MiMo-V2.5Xiaomi
- Step 3.5 Flash 2603 vs Gemma 4 E4B ITGoogle
