Qwen3.5 4B vs GPT-5.3 Chat vs LFM2 24B A2B
Qwen3.5 4B comes out ahead, 78 to 58 and 28 on our weighted score, and it is the cheaper option too.
- Our pick
Alibaba (Qwen)Qwen3.5 4B
78/100- ECI—
- Price$0.04 / $0.07
- Context262K
OpenAIGPT-5.3 Chat
28/100- ECI—
- Price$1.75 / $14.00
- Context128K
Liquid AILFM2 24B A2B
58/100- ECI—
- Price$0.03 / $0.12
- Context33K
Qwen3.5 4B is our pick
Qwen3.5 4B is the better all-round choice, scoring 78/100 against LFM2 24B A2B (58) and GPT-5.3 Chat (28). It leads on inputs & features and context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceQwen3.5 4BQwen3.5 4B $0.048 · LFM2 24B A2B $0.052 · GPT-5.3 Chat $4.81 per 1M tokens (3:1 blend)
- Longest contextQwen3.5 4BQwen3.5 4B 262,144 · GPT-5.3 Chat 128,000 · LFM2 24B A2B 32,768 tokens
- Widest inputsQwen3.5 4BQwen3.5 4B: Text, Images, Video · GPT-5.3 Chat: Text, Images · LFM2 24B A2B: Text
- Self-hostingQwen3.5 4B and LFM2 24B A2BPublishes downloadable weights (Apache-2.0 and LFM Open License v1.0)
| Measure | Weight | Qwen3.5 4B | GPT-5.3 Chat | LFM2 24B A2B |
|---|---|---|---|---|
| Price | 50% | 100 | 17 | 100 |
| Inputs & features | 30% | 70 | 50 | 25 |
| Context window | 20% | 37 | 24 | 0 |
| Overall | 100% | 78/100 | 28/100 | 58/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Qwen3.5 4BAlibaba (Qwen) | GPT-5.3 ChatOpenAI | LFM2 24B A2BLiquid AI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| OTIS Mock AIME 2024–2025Competition mathematics | 55.8% | — | — |
| Price per million tokens | |||
| Input | $0.04 | $1.75 | $0.03 (best) |
| Output | $0.07 (best) | $14.00 | $0.12 |
| Cached input | — | — | — |
| Blended (3:1) | $0.048 (best) | $4.81 | $0.052 |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Median of 3 providers | Median of 4 providers | Median of 1 providers |
| Limits | |||
| Context window | 262,144 tokens (best) | 128,000 tokens | 32,768 tokens |
| Max output | 81,920 tokens (best) | 16,384 tokens | 32,768 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | No |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | Yes | No | No |
| Reasoning | Yes | No | No |
| Tool calling | Yes | Yes | Yes |
| Structured output | No | No | No |
| Availability | |||
| Weights | OpenApache-2.0 | Proprietary | OpenLFM Open License v1.0 |
| API model ID | — | — | — |
| API providers | 5 (best) | 4 | 1 |
| Released | Mar 2, 2026 | Mar 3, 2026 | Feb 24, 2026 |
| Knowledge cutoff | — | Aug 31, 2025 | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Qwen3.5 4B$0.54
- GPT-5.3 Chat$45.50
- LFM2 24B A2B$0.54
Which should you choose?
Which is better: Qwen3.5 4B, GPT-5.3 Chat or LFM2 24B A2B?
Qwen3.5 4B is the better all-round choice, scoring 78/100 against LFM2 24B A2B (58) and GPT-5.3 Chat (28). It leads on inputs & features and context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Qwen3.5 4B, GPT-5.3 Chat or LFM2 24B A2B?
Qwen3.5 4B is cheaper at $0.04 input / $0.07 output per million tokens (median across 3 API providers). LFM2 24B A2B costs $0.03 input / $0.12 output per million tokens (median across 1 API provider); GPT-5.3 Chat costs $1.75 input / $14.00 output per million tokens (median across 4 API providers). At a typical mix of three input tokens to one output token, that is $0.048 per million tokens for Qwen3.5 4B versus $0.052 for LFM2 24B A2B (1.1× as much) and $4.81 for GPT-5.3 Chat (101× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Qwen3.5 4B has not been scored yet, GPT-5.3 Chat has not been scored yet and LFM2 24B A2B has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Qwen3.5 4B, GPT-5.3 Chat and LFM2 24B A2B yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
Qwen3.5 4B has the largest context window at 262,144 tokens, against 128,000 for GPT-5.3 Chat and 32,768 for LFM2 24B A2B. Maximum output per response: Qwen3.5 4B up to 81,920, GPT-5.3 Chat up to 16,384, LFM2 24B A2B up to 32,768 tokens.
Which can read images, PDFs, audio or video?
Qwen3.5 4B accepts text, images and video; GPT-5.3 Chat accepts text and images; LFM2 24B A2B accepts text. Qwen3.5 4B handles the widest range of inputs.
Are any of these open source?
Qwen3.5 4B and LFM2 24B A2B publishes its weights (Apache-2.0 and LFM Open License v1.0) and can be self-hosted; GPT-5.3 Chat is proprietary.
Which is newer?
GPT-5.3 Chat is the newest, released Mar 3, 2026. Qwen3.5 4B came out Mar 2, 2026; LFM2 24B A2B came out Feb 24, 2026. Knowledge cutoff: GPT-5.3 Chat Aug 31, 2025.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
