Skip to content
ModelCap

Head-to-head comparison

Qwen2.5 72B Instruct vs Qwen3.5-9B

Qwen2.5 72B Instruct (Qwen) and Qwen3.5-9B (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 17 August 2026

As of 17 August 2026, Qwen3.5-9B holds the stronger ModelCap Index position (#83 vs #182); Qwen3.5-9B is 2.7× cheaper per output token ($0.15/1M vs $0.40/1M); Qwen3.5-9B offers the longer context window (262K vs 33K tokens); and Qwen3.5-9B ships open weights.

Which should you choose?

Choose Qwen2.5 72B Instruct if…

  • ModelCap publishes no field on which Qwen2.5 72B Instruct leads Qwen3.5-9B for this pair.

Choose Qwen3.5-9B if…

  • you want the stronger overall ModelCap Index position — #83 against #182 (28.6 vs 18.2 points).
  • API cost matters — $0.15/1M output tokens against $0.40/1M, about 2.7× cheaper.
  • your workload is prompt-heavy — input tokens cost $0.10/1M against $0.36/1M.
  • you need the longer context window — 262K tokens against 33K.
  • you want to self-host: Qwen3.5-9B ships open weights while Qwen2.5 72B Instruct is restricted license.
  • you want provider choice — 5 listed API providers against 2.
  • Artificial Analysis Intelligence Index is your yardstick — 21.8 against 9.4.
  • you want the more recently listed model — Qwen3.5-9B was listed 10 March 2026, Qwen2.5 72B Instruct 19 September 2024.

Qwen2.5 72B Instruct vs Qwen3.5-9B: specs, pricing and context

Specification comparison of Qwen2.5 72B Instruct and Qwen3.5-9B
FieldQwen2.5 72B InstructQwenQwen3.5-9BQwen
ModelCap Index position#182#83
Index score18.228.6
EvidenceMeasuredMeasured
Input price / 1M tokens$0.36$0.10
Output price / 1M tokens$0.40$0.15
Context window33K tokens262K tokens
Max output tokens16K262K
API providers listed25
Weight accessRestricted licenseOpen weights
Input modalitiesTextText, Image, Video
First listed19 September 202410 March 2026
PublisherQwenQwen

Evidence: 3 public benchmark observations across 3 boards · 1 public benchmark observation across 1 board. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Qwen2.5 72B Instruct vs Qwen3.5-9B

Public benchmark boards where Qwen2.5 72B Instruct or Qwen3.5-9B has a published result
BoardQwen2.5 72B InstructQwen3.5-9BLeads
Arena codingArena (LMArena)13561348–1363—Only one result
Artificial Analysis Intelligence IndexArtificial Analysis9.4intelligence-index21.8intelligence-indexQwen3.5-9B

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.

Qwen2.5 72B Instruct vs Qwen3.5-9B: common questions

Is Qwen2.5 72B Instruct better than Qwen3.5-9B?

Qwen3.5-9B ranks higher on the ModelCap Index as of 17 August 2026: #83 against #182. 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.

Is Qwen2.5 72B Instruct cheaper than Qwen3.5-9B?

Qwen3.5-9B is cheaper on output tokens: $0.15/1M against $0.40/1M. Input tokens are $0.36/1M for Qwen2.5 72B Instruct and $0.10/1M for Qwen3.5-9B. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Qwen2.5 72B Instruct or Qwen3.5-9B?

Qwen3.5-9B has the larger context window: 262K tokens against 33K.

Which is better for coding, Qwen2.5 72B Instruct or Qwen3.5-9B?

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 Qwen2.5 72B Instruct and Qwen3.5-9B open-weight models?

Qwen2.5 72B Instruct: Restricted license. Qwen3.5-9B: Open weights. 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 Qwen2.5 72B Instruct and Qwen3.5-9B?

ModelCap currently lists 2 API providers for Qwen2.5 72B Instruct and 5 for Qwen3.5-9B, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Qwen2.5 72B Instruct vs Qwen3.5-9B comparison?

Every figure comes from the sealed ModelCap dataset published 17 August 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.

Explore further