2026-08-12

LFM2.5-VL-3B: The Real Story Is What Broke Last Time

AIOpen SourceInfrastructure🌍 North America

Liquid AI shipped LFM2.5-VL-3B today, a week and a half after the text-only LFM2.5-2.6B — the vision-language sibling in the same family, same architecture lineage, same on-device pitch. At 3.1B parameters it sits genuinely mid-pack in size against the eight-model comparison Liquid published: Qwen3.5 and InternVL3.5 both ship 2B and 4B variants in the chart, Gemma-4 ships an "E2B" and an 8B. That matters for how to read the results — this isn't the "small model beats giants" story the text-only release told; it's a model competing at its actual weight class, winning some categories and losing others, the way an honest comparison usually looks.

Where it actually leads, and where it doesn't

Across the nine benchmark clusters Liquid published, LFM2.5-VL-3B leads outright on two: General (70.1, edging InternVL3.5-4B's 69.7 and Qwen3.5-4B's 69.7) and Multilingual (81.2, ahead of Qwen3.5-4B's 79.5). It's a close second on three more — Grounding (87.9, behind InternVL3.5-4B's 88.8), Multi-Image (59.9, behind Qwen3.5-4B's 60.4), and GUI (80.7, behind both InternVL3.5 sizes at 82.0 and 84.1). And it trails clearly on Function calling, STEM, Document/OCR/Chart, and Hallucination — in most of those, Qwen3.5-4B (a larger model in this comparison) wins outright, and on Function calling specifically, Gemma-4-E4B-it and Qwen3.5-4B both beat it by a wide margin (50.8 and 59.3 against LFM2.5-VL-3B's 46.0).

That's a real, checkable, mixed result — worth taking at face value rather than reading it as either a win or a loss. A 3.1B model beating some 4.7B and 8B rivals on general visual understanding and multilingual tasks while losing to them on knowledge-dense benchmarks like document QA is roughly what you'd expect: broad perceptual competence compresses better than dense factual and STEM knowledge does, a pattern this month's coverage of small models keeps confirming from different angles.

The number Liquid didn't put in the headline

The comparison that actually matters most is LFM2.5-VL-3B against its own predecessor, LFM2-VL-3B, same parameter count, one generation apart. Two deltas stand out against every other number in the chart:

  • GUI grounding: 5.4 → 80.7. Not an improvement, a fix. The previous generation was essentially non-functional at a task — reading screen coordinates, ScreenSpot-v2 desktop/mobile/web — that any agent meant to operate a computer needs as table stakes. A model that scored 5.4 on GUI grounding could not have shipped as a screen-using agent's vision backbone in any serious sense; one scoring 80.7 plausibly can.
  • Function calling: 23.4 → 46.0. Roughly double, on the other capability — reading tool schemas and calling them correctly from visual context — that separates a chatbot from an agent.

Liquid's own headline framing leans on the field comparison; the generational jump is the more consequential number, because it's the difference between "vision-capable chatbot" and "vision-capable agent backbone" for the same parameter budget. Everything else in the chart is Liquid competing against other labs' models on relatively stable capabilities; this is Liquid fixing something that was broken in its own previous release.

The throughput chart has its own gotcha

Liquid's GPU throughput comparison, on a single H100, splits the eight models into two visibly distinct clusters rather than a smooth ranking. LFM2.5-VL-3B leads one cluster clearly — peaking near 10,900 tokens/second against Qwen3.5-2B's ~9,500 and InternVL3.5-2B's ~9,300 at high concurrency. The second cluster — Qwen3.5-4B, InternVL3.5-4B, Gemma-4-E4B, and Gemma-4-E2B — plateaus far lower, around 5,000–6,000 tokens/second.

That grouping is worth a second look specifically because of where Gemma-4-E2B lands: its name implies a lightweight, "effective 2B" model, but its throughput puts it in the same slow cluster as the 4B and 8B models, not with the other sub-3B models in the fast cluster. A name suggesting efficiency didn't translate into inference throughput that matches it — the kind of gap this blog has flagged before between what a model's name implies and what actually shows up on a stopwatch.

What's still unconfirmed

We could not load Liquid's blog post or the Hugging Face model card directly — both domains are unreachable from this environment — so everything above comes from the two charts supplied directly rather than the full announcement. Architecture (presumably the same LFM2 hybrid convolution/attention design documented for the text-only sibling), license (presumably the same LFM Open License v1.0, with its $10M-revenue commercial cutoff), context length, and exact release framing are all inferred from the existing LFM2.5 family pattern, not confirmed for this specific model. Treat those as reasonable priors, not verified facts.

What to expect next

  • Watch for the model card to confirm architecture and license. If it breaks from the $10M-revenue-cutoff pattern the text-only release used, that's news in itself.
  • Watch whether the GUI-grounding fix holds up in real agent harnesses, not just the benchmark. A fifteen-fold jump on a held-out benchmark is a strong signal, not a guarantee it survives contact with real, messy screen layouts.
  • Watch InternVL3.5 as the comparison to beat. It leads Grounding and GUI outright in this chart — the two categories most relevant to a screen-operating agent — despite LFM2.5-VL-3B's efficiency advantage; whether Liquid closes that specific gap next generation is the more interesting rivalry than the aggregate score.

References: Liquid AI — LFM2.5-VL-3B announcement (unreachable from this environment; figures sourced from user-supplied charts) · related coverage: LFM2.5-2.6B: The Interesting Number Isn't the Price · Nemotron 3.5 Lightning · How Open Is "Open"? · Frontier Arcade: trends & predictions