Gemini 1.5 Flash 8B vs Nemotron 3 Ultra
Gemini 1.5 Flash 8B (2024) and Nemotron 3 Ultra (2026) are frontier reasoning models from Google DeepMind and NVIDIA AI. Gemini 1.5 Flash 8B ships a 1m-token context window, while Nemotron 3 Ultra ships a 1m-token context window. On pricing, Gemini 1.5 Flash 8B costs $0.04/1M input tokens versus $0.50/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Gemini 1.5 Flash 8B is ~1233% cheaper at $0.04/1M; pay for Nemotron 3 Ultra only for reasoning depth.
Decision scorecard
Local evidence first| Signal | Gemini 1.5 Flash 8B | Nemotron 3 Ultra |
|---|---|---|
| Best for | long-context analysis | reasoning-heavy apps and long-context analysis |
| Decision fit | Long context | Long context |
| Context window | 1m | 1m |
| Cheapest output | $0.15/1M tokens | $2.20/1M tokens |
| Provider routes | 1 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Gemini 1.5 Flash 8B has the lower cheapest tracked output price at $0.15/1M tokens.
- Local decision data tags Gemini 1.5 Flash 8B for Long context.
- Nemotron 3 Ultra uniquely exposes Reasoning in local model data.
- Local decision data tags Nemotron 3 Ultra for Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Gemini 1.5 Flash 8B
$67.50
Cheapest tracked route/tier: GCP Vertex AI
Nemotron 3 Ultra
$950
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $883. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- No overlapping tracked provider route is sourced for Gemini 1.5 Flash 8B and Nemotron 3 Ultra; plan for SDK, billing, or endpoint changes.
- Nemotron 3 Ultra is $2.05/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Nemotron 3 Ultra adds Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Nemotron 3 Ultra and Gemini 1.5 Flash 8B; plan for SDK, billing, or endpoint changes.
- Gemini 1.5 Flash 8B is $2.05/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-10-03 | 2026-06-04 |
| Context window | 1m | 1m |
| Parameters | 8B | 550B |
| Architecture | Decoder Only | Mixture of Experts |
| License | Proprietary | NVIDIA Open Model |
| Openness | Proprietary | Open weights |
| Commercial use | Commercial use: conditional | Commercial use: permitted |
| Knowledge cutoff | 2024-08 | - |
Pricing and availability
| Pricing attribute | Gemini 1.5 Flash 8B | Nemotron 3 Ultra |
|---|---|---|
| Input price | $0.04/1M tokens | $0.50/1M tokens |
| Output price | $0.15/1M tokens | $2.20/1M tokens |
| Providers |
Capabilities
| Capability | Gemini 1.5 Flash 8B | Nemotron 3 Ultra |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | Yes |
| Function calling | No | No |
| Tool use | No | No |
| Structured outputs | No | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Deep dive
The capability footprint differs most on reasoning mode: Nemotron 3 Ultra. Both models share the core language-model surface, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
For cost, Gemini 1.5 Flash 8B lists $0.04/1M input and $0.15/1M output tokens on the cheapest tracked provider, while Nemotron 3 Ultra lists $0.50/1M input and $2.20/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Gemini 1.5 Flash 8B lower by about $0.94 per million blended tokens. Availability is 1 providers versus 1, so concentration risk also matters.
Choose Gemini 1.5 Flash 8B when provider fit and lower input-token cost are central to the workload. Choose Nemotron 3 Ultra when reasoning depth are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency.
FAQ
Which has a larger context window, Gemini 1.5 Flash 8B or Nemotron 3 Ultra?
Gemini 1.5 Flash 8B supports 1m tokens, while Nemotron 3 Ultra supports 1m tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, Gemini 1.5 Flash 8B or Nemotron 3 Ultra?
Gemini 1.5 Flash 8B is cheaper on tracked token pricing. Gemini 1.5 Flash 8B costs $0.04/1M input and $0.15/1M output tokens. Nemotron 3 Ultra costs $0.50/1M input and $2.20/1M output tokens. Provider discounts or batch pricing can still change the final bill.
Is Gemini 1.5 Flash 8B or Nemotron 3 Ultra open source?
Gemini 1.5 Flash 8B is listed under Proprietary. Nemotron 3 Ultra is listed under NVIDIA Open Model. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for reasoning mode, Gemini 1.5 Flash 8B or Nemotron 3 Ultra?
Nemotron 3 Ultra has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Gemini 1.5 Flash 8B and Nemotron 3 Ultra?
Gemini 1.5 Flash 8B is available on GCP Vertex AI. Nemotron 3 Ultra is available on OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
When should I pick Gemini 1.5 Flash 8B over Nemotron 3 Ultra?
Gemini 1.5 Flash 8B is ~1233% cheaper at $0.04/1M; pay for Nemotron 3 Ultra only for reasoning depth. If your workload also depends on provider fit, start with Gemini 1.5 Flash 8B; if it depends on reasoning depth, run the same evaluation with Nemotron 3 Ultra.
Continue comparing
Last reviewed: 2026-06-15. Data sourced from public model cards and provider documentation.