Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)
This page compares GPT-5 (OpenAI) and NVIDIA: Nemotron 3.5 Lightning (nvidia) using the latest snapshots we have as of Aug 17, 2026. NVIDIA: Nemotron 3.5 Lightning wins on output price at $0.2/1M. NVIDIA: Nemotron 3.5 Lightning has the larger context window (1M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.
OpenAI
GPT-5OpenAI flagship reasoning model for 2025–26. Strong general preference Elo and multimodal coverage.
nvidia
NVIDIA: Nemotron 3.5 LightningAuto-discovered from OpenRouter (nvidia/nemotron-3.5-lightning). Preview until a second source matches.
reasoning_effortReasoning models scale test-time compute by generating hidden chain-of-thought (CoT) tokens. These tokens are billed at standard output rates and directly expand latency (TTFT) in exchange for higher GPQA Diamond and SWE-bench Verified problem resolve rates.
Default evaluation baseline balancing reasoning depth with stream rate.
"reasoning_effort": "medium"
"reasoning": {
"effort": "medium",
"max_tokens": 1500
}Instant pairwise benchmark recalculation across 400+ LLMs
Category wins across intelligence, speed, and pricing efficiency.
Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy
Generation throughput and time to first token responsiveness
Cost per million tokens and max context window length
Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.
No shared data
No shared data
$9.80/1M cheaper
Simulate monthly production API costs in USD (US Dollar).
NVIDIA: Nemotron 3.5 Lightning is estimated to save $187.95/month ($2,255/year).
Need SWE-bench on both sides.
Lower output list price ($0.2/1M).
Need TTFT on both sides.
Larger window (1M).
GPT-5 is the side marked multimodal in the catalog.
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | insufficient data | Need SWE-bench on both sides. |
| High-volume chat | NVIDIA: Nemotron 3.5 Lightning | Lower output list price ($0.2/1M). |
| Voice / low-latency UI | insufficient data | Need TTFT on both sides. |
| Long-document RAG | NVIDIA: Nemotron 3.5 Lightning | Larger window (1M). |
| Screenshots / vision | GPT-5 | GPT-5 is the side marked multimodal in the catalog. |
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The real PNG is generated at /compare/gpt-5-vs-nemotron-3-5-lightning/opengraph-image for crawlers.
Verified head-to-head card