GPT-5.4 Nano vs Grok 4.5
GPT-5.4 Nano (OpenAI) and Grok 4.5 (xAI) compared on benchmarks, pricing, context window, and use-case rankings.
- Grok 4.5 leads on overall intelligence (ECI 154 vs 147).
- GPT-5.4 Nano is cheaper on input tokens — $0.20 vs $2.00 per 1M.
- Grok 4.5 has a larger context window (500K vs 400K tokens).
- Grok 4.5 ranks higher for coding (91th vs 67th percentile).
| Attribute | GPT-5.4 Nano | Grok 4.5 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 147 | 154 |
| Coding | 67 | 91 |
| Math | 44 | 85 |
| Reasoning & Knowledge | 29 | 70 |
| Agentic & Tools | 32 | 75 |
| Specifications | ||
| Developer | OpenAI | xAI |
| Family | GPT | Grok |
| Released | Mar 17, 2026 | Jul 8, 2026 |
| Parameters | — | — |
| Availability | API access | API access |
| Context window | 400K | 500K |
| Price — $/M input | $0.20 | $2.00 |
| Price — $/M output | $1.25 | $6.00 |
| Inputs | file, image, text | text, image, file |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 88% | 98% |
| APEX | 17% | 34% |
| ARC-AGI | 52% | 87% |
| ARC-AGI-2 | 6% | 53% |
| FrontierMath | 26% | — |
| FrontierMath Tier 4 | 6% | — |
| GPQA Diamond | 78% | 93% |
| Humanity's Last Exam | 27% | 40% |
| SciCode | 47% | 54% |
| SimpleQA Verified | 12% | 54% |
| WeirdML | 49% | 46% |
| τ²-bench | 76% | — |
| SimpleBench | — | 70% |
| WebDev Arena | — | 1551 |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Is GPT-5.4 Nano better than Grok 4.5?
On Epoch AI's Capabilities Index, Grok 4.5 scores higher (154) than GPT-5.4 Nano (147). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
Which is cheaper, GPT-5.4 Nano or Grok 4.5?
GPT-5.4 Nano is cheaper on input tokens at $0.20 per million, versus $2.00 (representative OpenRouter pricing).
Which has a larger context window, GPT-5.4 Nano or Grok 4.5?
Grok 4.5 supports up to 500K tokens, compared with 400K for the other.
Which is better for coding, GPT-5.4 Nano or Grok 4.5?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Grok 4.5 ranks higher — 91th vs 67th percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.