Qwen3.5-9B vs Qwen3.8 Omni Flash
Qwen3.5-9B costs 3.1x less per output token than Qwen3.8 Omni Flash ($0.15 vs $0.47 per million). Updated October 23, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $0.15
- Coding
- No data
- Overall
- No data
- Output $/M
- $0.47
Qwen3.5-9B or Qwen3.8 Omni Flash: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick Qwen3.5-9B for output tokens 3.1x cheaper ($0.15 vs $0.47 per million).
No benchmark has tested both yet. Qwen3.5-9B has results on AA Coding Index, SciCode and Terminal-Bench Hard (Artificial Analysis run); Qwen3.8 Omni Flash has none yet. Compare them on price and context instead.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
No call
Only Qwen3.5-9B has a AA Intelligence Index result, 13.3.
Directional only
Long documents
Listed context window
Qwen3.8 Omni Flash
Qwen3.8 Omni Flash takes 1M tokens against 262K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Qwen3.5-9B
Qwen3.5-9B $0.0002, Qwen3.8 Omni Flash $0.0004 per turn.
List prices
At a glance
- Coding index
- Qwen3.5-9B not benchmarked, Qwen3.8 Omni Flash not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- Qwen3.5-9B $0.15 against Qwen3.8 Omni Flash $0.47 per million output tokens, 3.1x apart.
- Context window
- Qwen3.5-9B takes 262K tokens, Qwen3.8 Omni Flash 1M.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
CodingDirectional onlySix of these boards feed the Vibe Coding Index4 boards measured
| Benchmark | Qwen3.5-9B | Qwen3.8 Omni Flash | Leader |
|---|---|---|---|
| AA Coding Index | 23.5 | Not measured | Only Qwen3.5-9B measured |
| SciCode | 29.5% | Not measured | Only Qwen3.5-9B measured |
| Terminal-Bench Hard (Artificial Analysis run) | 24.2% | Not measured | Only Qwen3.5-9B measured |
| Terminal-Bench | 9.2% | Not measured | Only Qwen3.5-9B measured |
| Neither model has a result on the other 39 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards measured
| Benchmark | Qwen3.5-9B | Qwen3.8 Omni Flash | Leader |
|---|---|---|---|
| AA Intelligence Index | 13.3 | Not measured | Only Qwen3.5-9B measured |
| Epoch Capabilities Index | 139.3 | Not measured | Only Qwen3.5-9B measured |
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Qwen3.5-9B | Qwen3.8 Omni Flash | Leader |
|---|---|---|---|
| τ²-Bench Telecom | 86.8% | Not measured | Only Qwen3.5-9B measured |
| Neither model has a result on the other 41 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index3 boards measured
| Benchmark | Qwen3.5-9B | Qwen3.8 Omni Flash | Leader |
|---|---|---|---|
| GPQA Diamond (Artificial Analysis run) | 80.6% | Not measured | Only Qwen3.5-9B measured |
| Humanity's Last Exam (Artificial Analysis run) | 14.9% | Not measured | Only Qwen3.5-9B measured |
| GPQA Diamond (Epoch AI run) | 79.0% | Not measured | Only Qwen3.5-9B measured |
| Neither model has a result on the other 20 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index2 boards measured
| Benchmark | Qwen3.5-9B | Qwen3.8 Omni Flash | Leader |
|---|---|---|---|
| OTIS Mock AIME | 61.7% | Not measured | Only Qwen3.5-9B measured |
| MathArena | 13.0% | Not measured | Only Qwen3.5-9B measured |
| Neither model has a result on the other 12 boards here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index4 boards measured
| Benchmark | Qwen3.5-9B | Qwen3.8 Omni Flash | Leader |
|---|---|---|---|
| IFBench | 66.7% | Not measured | Only Qwen3.5-9B measured |
| Long context reasoning (AA-LCR) | 70.0% | Not measured | Only Qwen3.5-9B measured |
| DTBench | 71.2% | Not measured | Only Qwen3.5-9B measured |
| LMCA | 24.5% | Not measured | Only Qwen3.5-9B measured |
| Neither model has a result on the other 44 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Qwen3.5-9B costs less
Repository review
50K input + 3K output tokens
Qwen3.5-9B costs less
Agent loop
200K input + 10K output tokens
Qwen3.5-9B costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Qwen3.5-9B | Qwen3.8 Omni Flash |
|---|---|---|
| Maker | Qwen | Qwen |
| Weights | Open weights | No public weights listed |
| Released | March 10, 2026 | September 21, 2026 |
| Context window | 262K | 1M |
| Input $/Mtok | $0.10 | $0.15 |
| Output $/Mtok | $0.15 | $0.47 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Qwen3.5-9B better than Qwen3.8 Omni Flash for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick Qwen3.5-9B for output tokens 3.1x cheaper ($0.15 vs $0.47 per million).
Which is cheaper, Qwen3.5-9B or Qwen3.8 Omni Flash?
Qwen3.5-9B costs $0.10 per million input tokens and $0.15 per million output tokens; Qwen3.8 Omni Flash costs $0.15 and $0.47. Cost per solved task is known for neither of them.
Which has the bigger context window, Qwen3.5-9B or Qwen3.8 Omni Flash?
Qwen3.8 Omni Flash, with 1M tokens against 262K.
Has any benchmark tested both Qwen3.5-9B and Qwen3.8 Omni Flash?
No benchmark has tested both yet. Qwen3.5-9B has results on AA Coding Index, SciCode and Terminal-Bench Hard (Artificial Analysis run); Qwen3.8 Omni Flash has none yet. Compare them on price and context instead. Data as of October 23, 2026.