GPT-5.2 vs Nemotron 3.5 Lightning (30B A3B): Specs & Benchmark Comparison
GPT-5.2 is developed by OpenAI, while Nemotron 3.5 Lightning (30B A3B) comes from NVIDIA. GPT-5.2 was released in December 2025, and Nemotron 3.5 Lightning (30B A3B) followed 8 months later in August 2026. Nemotron 3.5 Lightning (30B A3B) has a published size of about 30 billion parameters; OpenAI has not disclosed the parameter count of GPT-5.2.
The two models share 4 published benchmarks. GPT-5.2 leads on 4 of them. The widest gaps are on BrowseComp, where GPT-5.2 scores 65.8% against 37.0%; SWE-Bench Verified, where GPT-5.2 scores 80.0% against 51.6%. Averaged across everything we track, GPT-5.2 sits at 78.2% and Nemotron 3.5 Lightning (30B A3B) at 45.3%.
Nemotron 3.5 Lightning (30B A3B) is the cheaper API at $0.05 per million input tokens and $0.20 per million output tokens, roughly 30 times cheaper than GPT-5.2 at $1.50 and $6. Both accept a context window of about 256K tokens. GPT-5.2 accepts text, images, audio, and video as input, while Nemotron 3.5 Lightning (30B A3B) accepts text.
| Characteristic | GPT-5.2 | Nemotron 3.5 Lightning (30B A3B) |
|---|---|---|
| Company | OpenAI | NVIDIA |
| Release Date | December 10, 2025 | August 11, 2026 |
| Parameters | — | 30B |
| Multimodal | Yes | No |
| Context (input) | 256K | 262K |
| Context (output) | 128K | 262K |
| Input Price / 1M | $1.50 | $0.05 |
| Output Price / 1M | $6.00 | $0.20 |
| Average Score | 78.2% | 45.3% |
| Benchmarks | ||
| BrowseComp | 65.8% | 37.0% |
| SWE-Bench Verified | 80.0% | 51.6% |
| Humanity's Last Exam | 34.5% | 11.7% |
| GPQA | 92.0% | 75.0% |
Visual Benchmark Comparison
Verdict
Nemotron 3.5 Lightning (30B A3B) leads in 3 out of 5 comparison categories.
Both models show comparable average scores: GPT-5.2 — 0.8, Nemotron 3.5 Lightning (30B A3B) — 0.5.
On SWE-Bench, both models are nearly equal: GPT-5.2 — 0.8, Nemotron 3.5 Lightning (30B A3B) — 0.5.
Nemotron 3.5 Lightning (30B A3B) is 30.0x cheaper: input $0.05/1M vs $1.50/1M tokens.
Nemotron 3.5 Lightning (30B A3B) supports a larger context: 262K vs 256K tokens.
Nemotron 3.5 Lightning (30B A3B) is newer: released 8/11/2026 vs 12/10/2025.
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Frequently Asked Questions
Which is better for coding — GPT-5.2 or Nemotron 3.5 Lightning (30B A3B)?
Which model is cheaper — GPT-5.2 or Nemotron 3.5 Lightning (30B A3B)?
Which has a larger context window — GPT-5.2 or Nemotron 3.5 Lightning (30B A3B)?
The GPT-5.2 and Nemotron 3.5 Lightning (30B A3B) comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GPT-5.2 or Nemotron 3.5 Lightning (30B A3B) page. See also the complete list of AI model comparisons.