Model comparison
LFM2.5-8B-A1B vs Qwen3.5 Plus
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: LFM2.5-8B-A1B #166 (Estimated); Qwen3.5 Plus #138 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. LFM2.5-8B-A1B and Qwen3.5 Plus share 0 comparable benchmark results. 1 of 8 categories are comparable. 17 results are unique to LFM2.5-8B-A1B; 4 to Qwen3.5 Plus.
Updated July 21, 2026- Shared results
- 0
- LFM2.5-8B-A1B only
- 17
- Qwen3.5 Plus only
- 4
- Comparable categories
- 1 / 8
Pick Qwen3.5 Plus if you want the stronger benchmark profile. LFM2.5-8B-A1B only becomes the better choice if mathematics is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Qwen3.5 Plus is clearly ahead on the BenchAlign aggregate, 47.2 to 41.42. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Qwen3.5 Plus is also the more expensive model on tokens at $0.40 input / $2.40 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for LFM2.5-8B-A1B. That is roughly Infinityx on output cost alone. Qwen3.5 Plus gives you the larger context window at 1M, compared with 128K for LFM2.5-8B-A1B.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | LFM2.5-8B-A1B | Qwen3.5 Plus | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | LFM2.5-8B-A1B$0 input / $0 output | Qwen3.5 Plus$0.4 input / $2.4 output | LFM2.5-8B-A1B has the lower combined listed price. |
| Generation speedtokens per second | LFM2.5-8B-A1BNot available | Qwen3.5 PlusNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | LFM2.5-8B-A1BNot available | Qwen3.5 PlusNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | LFM2.5-8B-A1B128K | Qwen3.5 Plus1M | Qwen3.5 Plus lists the larger context window. |
Benchmark Deep Dive
Agentic3 benchmarks
Coding2 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | LFM2.5-8B-A1B | Qwen3.5 Plus | Result |
|---|---|---|---|
| AA-GPQA DiamondSource | 51.3% | — | Not comparable |
| AA-HLESource | 6.9% | — | Not comparable |
| AA-Omniscience IndexSource | -33.3% | — | Not comparable |
| AA-Omniscience AccuracySource | 9.4% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 47.0% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 8.3% | — | Not comparable |
MathLFM2.5-8B-A1B wins5 benchmarks
Frequently Asked Questions (2)
Which is better, LFM2.5-8B-A1B or Qwen3.5 Plus?
Qwen3.5 Plus is ahead on BenchLM's BenchAlign leaderboard, 47.2 to 41.42.
Which is better for math, LFM2.5-8B-A1B or Qwen3.5 Plus?
LFM2.5-8B-A1B has the edge for math in this comparison, averaging 50 versus 16.3. Qwen3.5 Plus stays close enough that the answer can still flip depending on your workload.
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