GPT-5 nano vs Grok 3
GPT-5 nano vs Grok 3: GPT-5 nano is cheaper by 98% on average. GPT-5 nano from Azure OpenAI (272,000-token context, reasoning, tool calls) vs. Grok 3 from xAI (131,072-token context, tool calls). Use Agent Command Center to A/B both in shadow mode and pick the winner per workload.
Side-by-side cost
Live workload comparison
Same workload run through both models. The cheaper one is highlighted.
3,000
0272,000
400
0131,072
5,000
01,000,000
At this workload, GPT-5 nano is 98% cheaper than Grok 3 — a savings of $2,236/month ($26,828/year).
Production recipe — Agent Command Center
strategy: cost-optimized
primary:
model: gpt-5-nano
provider: azure-openai
fallback:
model: grok-3
provider: xai
shadow: { sample_rate: 0.05 } # mirror 5% of traffic to compare quality live| GPT-5 nano | Grok 3 | |
|---|---|---|
| Input price | $0.0500/M | $3.00/M |
| Output price | $0.400/M | $15.00/M |
| Context window | 272,000 | 131,072 |
| Max output | 128,000 | 131,072 |
| Function calling | ✓ | ✓ |
| Vision | ✓ | — |
| Audio input | — | — |
| Reasoning | ✓ | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | — |
| Pricing verified | May 12, 2026 | May 12, 2026 |
Benchmark comparison
Side-by-side public benchmark scores. Greener bar = winner.