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Head-to-head comparison

Qwen3.5 4B vs Qwen3 Omni 30B A3B Instruct

Qwen3.5 4B (Qwen) and Qwen3 Omni 30B A3B Instruct (Qwen) compared on the ModelCap Index, API price, context window, provider availability, weight access and every public benchmark board they share. Figures are the same ones shown on the live rankings; nothing here is a hidden score.

Snapshot as of 12 September 2026

As of 12 September 2026, Qwen3 Omni 30B A3B Instruct holds the stronger ModelCap Index position (#95 vs #120); and Qwen3.5 4B ships open weights.

Which should you choose?

Choose Qwen3.5 4B if…

  • you want to self-host: Qwen3.5 4B ships open weights while Qwen3 Omni 30B A3B Instruct is restricted license.
  • AA τ²-Bench Telecom is your yardstick — 92.1% against 16.4%.
  • AA Humanity's Last Exam is your yardstick — 9.9% against 4.6%.
  • you want the more recently listed model — Qwen3.5 4B was listed 27 February 2026, Qwen3 Omni 30B A3B Instruct 20 September 2025.

Choose Qwen3 Omni 30B A3B Instruct if…

  • you want the stronger overall ModelCap Index position — #95 against #120 (47.5 vs 38.7 points).

Qwen3.5 4B vs Qwen3 Omni 30B A3B Instruct: specs, pricing and context

Specification comparison of Qwen3.5 4B and Qwen3 Omni 30B A3B Instruct
FieldQwen3.5 4BQwenQwen3 Omni 30B A3B InstructQwen
ModelCap Index position#120#95
Index score38.747.5
EvidenceEstimatedEstimated
Input price / 1M tokensUnlistedUnlisted
Output price / 1M tokensUnlistedUnlisted
Context window— tokens— tokens
Max output tokens——
API providers listed00
Weight accessOpen weightsRestricted license
Input modalitiesText, ImageText, Image, Audio
First listed27 February 202620 September 2025
PublisherQwenQwen

Evidence: publisher-corpus-prior over 188 held-out anchors (26%); launch card against 3 resolved peers on 10 rows (74%); exceeds every named peer on 2 of 10 rows; optimism haircut 0.6 from cross-lab-probe; shrunk 4 up toward the measured corpus · publisher-corpus-prior over 188 held-out anchors (10%); launch card against 4 resolved peers on 4 rows (90%); exceeds every named peer on 1 of 4 rows; no cross-lab optimism probe available; shrunk 0.3 up toward the measured corpus. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Qwen3.5 4B vs Qwen3 Omni 30B A3B Instruct

Public benchmark boards where Qwen3.5 4B or Qwen3 Omni 30B A3B Instruct has a published result
BoardQwen3.5 4BQwen3 Omni 30B A3B InstructLeads
AA Terminal-Bench 2.1Artificial Analysis25.8%terminal-bench:2.1:terminus-2:e2b:pass-at-1:3-repeats:source-model="Qwen3.5 4B":reasoning=true—Only one result
AA τ²-Bench TelecomArtificial Analysis92.1%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="Qwen3.5 4B":reasoning=true16.4%tau2:telecom:dual-control:pass-at-1:3-repeats:source-model="Qwen3 Omni 30B A3B":reasoning=falseQwen3.5 4B
AA Humanity's Last ExamArtificial Analysis9.9%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="Qwen3.5 4B":reasoning=true4.6%hle:may-2025:text-only-2158:no-tools:pass-at-1:source-model="Qwen3 Omni 30B A3B":reasoning=falseQwen3.5 4B

Scores are the sources' own published figures for each model's best evaluated configuration; ModelCap never re-runs a benchmark.

Want a different pairing? Open the interactive comparison tool to swap either model for any current ranked language model.

Qwen3.5 4B vs Qwen3 Omni 30B A3B Instruct: common questions

Is Qwen3.5 4B better than Qwen3 Omni 30B A3B Instruct?

Qwen3 Omni 30B A3B Instruct ranks higher on the ModelCap Index as of 12 September 2026: #95 against #120. That is a capability ranking built from public benchmark evidence with published uncertainty; whether it is "better" for you also depends on price, context and where you can run it. Their published uncertainty intervals overlap, so the rank difference alone does not establish a reliable capability advantage for your workload.

Is Qwen3.5 4B cheaper than Qwen3 Omni 30B A3B Instruct?

At least one of the two has no listed API price on ModelCap right now, so no price comparison is made.

Which has the bigger context window, Qwen3.5 4B or Qwen3 Omni 30B A3B Instruct?

Both publish a —-token context window.

Which is better for coding, Qwen3.5 4B or Qwen3 Omni 30B A3B Instruct?

The two models do not share a coding benchmark board on ModelCap yet, so no head-to-head coding score is published; the ModelCap Index position is the closest overall signal.

Are Qwen3.5 4B and Qwen3 Omni 30B A3B Instruct open-weight models?

Qwen3.5 4B: Open weights. Qwen3 Omni 30B A3B Instruct: Restricted license. Open weights mean the checkpoint can be downloaded and self-hosted under its licence; API-only models are available solely through hosted endpoints.

Where can I run Qwen3.5 4B and Qwen3 Omni 30B A3B Instruct?

ModelCap currently lists 0 API providers for Qwen3.5 4B and 0 for Qwen3 Omni 30B A3B Instruct, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Qwen3.5 4B vs Qwen3 Omni 30B A3B Instruct comparison?

Every figure comes from the sealed ModelCap dataset published 12 September 2026; the page re-renders within a minute of each data refresh, and the ModelCap Index positions are the same ones shown on the live rankings.

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