GPT-4.1 nano vs LFM2.5-VL-450M
Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Verdict
LFM2.5-VL-450M leads for most workloads.
- GPT-4.1 nano offers ~7.8× the context window — choose it for very long inputs.
Based on BenchLM composite scores, July 2026.
GPT-4.1 nano
31
LFM2.5-VL-450M
35
Pick LFM2.5-VL-450M if you want the stronger benchmark profile. GPT-4.1 nano only becomes the better choice if knowledge is the priority or you need the larger 1M context window.
Category Radar
Head-to-Head by Category
Category Breakdown
| Benchmark | GPT-4.1 nano | Δ | LFM2.5-VL-450M |
|---|---|---|---|
| Knowledge | 50.3 | ← 29.8 | 20.5 |
| Inst. Following | 83.2 | ← 22.0 | 61.2 |
Operational Comparison
GPT-4.1 nano
LFM2.5-VL-450M
$0.1 / $0.4
$0 / $0
181 t/s
N/A
0.63s
N/A
1M
128K
Quick Verdict
Pick LFM2.5-VL-450M if you want the stronger benchmark profile. GPT-4.1 nano only becomes the better choice if knowledge is the priority or you need the larger 1M context window.
LFM2.5-VL-450M is clearly ahead on the provisional aggregate, 35 to 31. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-4.1 nano is also the more expensive model on tokens at $0.10 input / $0.40 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-4.1 nano gives you the larger context window at 1M, compared with 128K for LFM2.5-VL-450M.
Benchmark Deep Dive
Frequently Asked Questions (3)
Which is better, GPT-4.1 nano or LFM2.5-VL-450M?
LFM2.5-VL-450M is ahead on BenchLM's provisional leaderboard, 35 to 31. The biggest single separator in this matchup is GPQA, where the scores are 50.3% and 25.7%.
Which is better for knowledge tasks, GPT-4.1 nano or LFM2.5-VL-450M?
GPT-4.1 nano has the edge for knowledge tasks in this comparison, averaging 50.3 versus 20.5. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Which is better for instruction following, GPT-4.1 nano or LFM2.5-VL-450M?
GPT-4.1 nano has the edge for instruction following in this comparison, averaging 83.2 versus 61.2. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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