GPT-5.4 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 leads for most workloads.
Based on BenchLM composite scores, July 2026.
GPT-5.4
86
LFM2.5-VL-450M
35
Verified leaderboard positions: GPT-5.4 #11 · LFM2.5-VL-450M unranked
Pick GPT-5.4 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 | Δ | LFM2.5-VL-450M |
|---|---|---|---|
| Knowledge | 57.6 | ← 37.1 | 20.5 |
| Agentic | 77.2 | — | — |
| Coding | 57.7 | — | — |
| Multimodal | 73.2 | — | — |
| Inst. Following | — | — | 61.2 |
Operational Comparison
GPT-5.4
LFM2.5-VL-450M
$2.5 / $15
$0 / $0
74 t/s
N/A
151.79s
N/A
1.05M
128K
Quick Verdict
Pick GPT-5.4 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 is clearly ahead on the provisional aggregate, 86 to 35. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.4's sharpest advantage is in knowledge, where it averages 57.6 against 20.5. The single biggest benchmark swing on the page is GPQA, 92.8% to 25.7%.
GPT-5.4 is also the more expensive model on tokens at $2.50 input / $15.00 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 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 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 or LFM2.5-VL-450M?
GPT-5.4 is ahead on BenchLM's provisional leaderboard, 86 to 35. The biggest single separator in this matchup is GPQA, where the scores are 92.8% and 25.7%.
Which is better for knowledge tasks, GPT-5.4 or LFM2.5-VL-450M?
GPT-5.4 has the edge for knowledge tasks in this comparison, averaging 57.6 versus 20.5. Inside this category, GPQA is the benchmark that creates the most daylight between them.
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