GPT-5.4 Pro vs LFM2.5-VL-450M
Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Verdict
GPT-5.4 Pro leads for most workloads.
Based on BenchLM composite scores, July 2026.
GPT-5.4 Pro
84
LFM2.5-VL-450M
35
Pick GPT-5.4 Pro if you want the stronger benchmark profile. LFM2.5-VL-450M only becomes the better choice if you want the cheaper token bill or you would rather avoid the extra latency and token burn of a reasoning model.
Category Radar
Head-to-Head by Category
Category Breakdown
| Benchmark | GPT-5.4 Pro | Δ | LFM2.5-VL-450M |
|---|---|---|---|
| Knowledge | 48.4 | ← 27.9 | 20.5 |
| Agentic | 89.3 | — | — |
| Reasoning | 83.3 | — | — |
| Math | 50.0 | — | — |
| Multimodal | 94.0 | — | — |
| Inst. Following | — | — | 61.2 |
Operational Comparison
GPT-5.4 Pro
LFM2.5-VL-450M
$30 / $180
$0 / $0
74 t/s
N/A
151.79s
N/A
1.05M
128K
Quick Verdict
Pick GPT-5.4 Pro if you want the stronger benchmark profile. LFM2.5-VL-450M only becomes the better choice if you want the cheaper token bill or you would rather avoid the extra latency and token burn of a reasoning model.
GPT-5.4 Pro is clearly ahead on the provisional aggregate, 84 to 35. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.4 Pro's sharpest advantage is in knowledge, where it averages 48.4 against 20.5.
GPT-5.4 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for LFM2.5-VL-450M. That is roughly Infinityx on output cost alone. GPT-5.4 Pro is the reasoning model in the pair, while LFM2.5-VL-450M is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 128K for LFM2.5-VL-450M.
Benchmark Deep Dive
Frequently Asked Questions (2)
Which is better, GPT-5.4 Pro or LFM2.5-VL-450M?
GPT-5.4 Pro is ahead on BenchLM's provisional leaderboard, 84 to 35.
Which is better for knowledge tasks, GPT-5.4 Pro or LFM2.5-VL-450M?
GPT-5.4 Pro has the edge for knowledge tasks in this comparison, averaging 48.4 versus 20.5. LFM2.5-VL-450M stays close enough that the answer can still flip depending on your workload.
Related Comparisons
Explore More
The AI models change fast. We track them for you.
For engineers, researchers, and the plain curious — a weekly brief on new models, ranking shifts, and pricing changes.
Free. No spam. Unsubscribe anytime.