LFM2.5-24B-A2B vs Qwen3.5 4B
Wins 2 of 3 areas
Coding · Following instructions
Wins 1 of 3 areas
Reasoning
LFM2.5-24B-A2B is the stronger all-rounder.Qwen3.5 4B is cheaper and better at reasoning.
Scores updated · 8 tests both models report · How we compare
Where each one wins
Tests won in each of the three areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
Coding and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Qwen3.5 4B costs 76% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where LFM2.5-24B-A2B pulls ahead
Where Qwen3.5 4B pulls ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+2.7points ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+2.5points ahead
Every test, side by side
All 8 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningQwen3.5 4B
- GPQA DiamondQwen3.5 4B by 2.774.477.1+2.7
- Humanity's Last ExamQwen3.5 4B by 2.57.49.9+2.5
Following instructionsLFM2.5-24B-A2B
- IFBenchLFM2.5-24B-A2B by 22.774.752+22.7
Other results4 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- BFCLv4LFM2.5-24B-A2B by 14.46550.6+14.4
- PinchBenchLFM2.5-24B-A2B by 11.983.271.3+11.9
- IFEvalLFM2.5-24B-A2B by 10.696.886.2+10.6
- τ³-Bench BankingLFM2.5-24B-A2B by 2.585.5+2.5
Questions people ask
Which is better, LFM2.5-24B-A2B or Qwen3.5 4B?
LFM2.5-24B-A2B wins two of the three areas where both have results: coding and following instructions. Qwen3.5 4B wins reasoning, and costs 76% less.
Which is better for coding?
LFM2.5-24B-A2B. It wins the one coding test both models report.
Which is cheaper?
LFM2.5-24B-A2B costs $0.05 per million input tokens and $0.70 per million output tokens; Qwen3.5 4B costs $0.03 and $0.15. That makes Qwen3.5 4B about 76% cheaper for the same work.
How do you compare the two?
We use the 8 benchmark tests both models have published scores on. The verdict counts the 4 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 4 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.