GPT-5.4 nano vs Grok 4.5
Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Verdict
Grok 4.5 leads for most workloads.
- GPT-5.4 nano is ~10× cheaper on input tokens — the budget pick.
Based on BenchLM composite scores, July 2026.
GPT-5.4 nano
62
Grok 4.5
75
Pick Grok 4.5 if you want the stronger benchmark profile. GPT-5.4 nano only becomes the better choice if you want the cheaper token bill.
Category Radar
Head-to-Head by Category
Category Breakdown
| Benchmark | GPT-5.4 nano | Δ | Grok 4.5 |
|---|---|---|---|
| Agentic | 42.9 | → 40.4 | 83.3 |
| Coding | — | — | 64.7 |
| Knowledge | 43.8 | — | — |
| Multimodal | 66.1 | — | — |
Operational Comparison
GPT-5.4 nano
Grok 4.5
$0.2 / $1.25
$2 / $6
191 t/s
N/A
3.64s
N/A
400K
500K
Quick Verdict
Pick Grok 4.5 if you want the stronger benchmark profile. GPT-5.4 nano only becomes the better choice if you want the cheaper token bill.
Grok 4.5 is clearly ahead on the provisional aggregate, 75 to 62. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok 4.5's sharpest advantage is in agentic, where it averages 83.3 against 42.9. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 46.3% to 83.3%.
Grok 4.5 is also the more expensive model on tokens at $2.00 input / $6.00 output per 1M tokens, versus $0.20 input / $1.25 output per 1M tokens for GPT-5.4 nano. That is roughly 4.8x on output cost alone. Grok 4.5 gives you the larger context window at 500K, compared with 400K for GPT-5.4 nano.
Benchmark Deep Dive
Frequently Asked Questions (2)
Which is better, GPT-5.4 nano or Grok 4.5?
Grok 4.5 is ahead on BenchLM's provisional leaderboard, 75 to 62. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 46.3% and 83.3%.
Which is better for agentic tasks, GPT-5.4 nano or Grok 4.5?
Grok 4.5 has the edge for agentic tasks in this comparison, averaging 83.3 versus 42.9. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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