Codex Mini Latest vs Nemotron 3 Ultra
Codex Mini Latest (2025) and Nemotron 3 Ultra (2026) compare a coding-specialized model against a standalone API model. Codex Mini Latest ships a 200k-token context window, while Nemotron 3 Ultra ships a 1m-token context window. This page treats the result as workflow and deployment fit, not a universal model winner.
Treat this as a product-type comparison: Codex Mini Latest is coding-specialized model, while Nemotron 3 Ultra is standalone API model. Choose based on workflow fit before reading any benchmark or price row as decisive.
Decision scorecard
Local evidence first| Signal | Codex Mini Latest | Nemotron 3 Ultra |
|---|---|---|
| Product type | Coding-specialized model | Standalone API model |
| Best for | custom coding agents and code generation | reasoning-heavy apps and long-context analysis |
| Decision fit | Coding and Long context | Long context |
| Context window | 200k | 1m |
| Cheapest output | - | - |
| Provider routes | 0 tracked | 0 tracked |
| Shared benchmarks | 0 rows | 0 rows |
Decision tradeoffs
- Local decision data tags Codex Mini Latest for Coding and Long context.
- Nemotron 3 Ultra has the larger context window for long prompts, retrieval packs, or transcript analysis.
- 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.
Codex Mini Latest
Unavailable
No complete token price in local provider data
Nemotron 3 Ultra
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Codex Mini Latest and Nemotron 3 Ultra; plan for SDK, billing, or endpoint changes.
- Nemotron 3 Ultra adds Reasoning in local capability data.
- No overlapping tracked provider route is sourced for Nemotron 3 Ultra and Codex Mini Latest; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Reasoning before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2025-05-16 | 2026-06-04 |
| Context window | 200k | 1m |
| Parameters | — | 550B |
| Architecture | decoder only | moe |
| License | Proprietary | NVIDIA Open Model |
| Openness | Proprietary | Open weights |
| Commercial use | Commercial use with conditions | Commercial use allowed |
| Knowledge cutoff | 2024-06 | - |
Pricing and availability
| Pricing attribute | Codex Mini Latest | Nemotron 3 Ultra |
|---|---|---|
| Input price | - | - |
| Output price | - | - |
| Providers | - | - |
Pricing not yet sourced for either model.
Capabilities
| Capability | Codex Mini Latest | 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 rows are currently sourced 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.
Pricing coverage is uneven: Codex Mini Latest has no token price sourced yet and Nemotron 3 Ultra has no token price sourced yet. Provider availability is 0 tracked routes versus 0. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Codex Mini Latest when coding workflow support are central to the workload. Choose Nemotron 3 Ultra when reasoning depth and larger context windows 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. For teams standardizing a stack, that distinction is often the difference between a benchmark win and a reliable deployment.
FAQ
Which has a larger context window, Codex Mini Latest or Nemotron 3 Ultra?
Nemotron 3 Ultra supports 1m tokens, while Codex Mini Latest supports 200k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Codex Mini Latest or Nemotron 3 Ultra open source?
Codex Mini Latest 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, Codex Mini Latest 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.
When should I pick Codex Mini Latest over Nemotron 3 Ultra?
Treat this as a product-type comparison: Codex Mini Latest is coding-specialized model, while Nemotron 3 Ultra is standalone API model. Choose based on workflow fit before reading any benchmark or price row as decisive. If your workload also depends on coding workflow support, start with Codex Mini Latest; if it depends on reasoning depth, run the same evaluation with Nemotron 3 Ultra.
Continue comparing
Last reviewed: 2026-06-09. Data sourced from public model cards and provider documentation.