BenchLeader
AlibabaReasoning modelAuto-detected

Qwen3.5 Flash

Best configuration ranks #265 of 610 on the BenchLeader Index at 51.8 ±6.0. Last measured 8 Sept 2026. Released 25 Feb 2026.

Blended price
$0.559/M
$0.172 in · $1.72 out
Output speed
41 tok/s
First answer
0.56 s
Context
1M
How it scores by categoryDashed line = average model (50). One step of 15 = one standard deviation.
  1. Overall index52
  2. Reasoning59
  3. Coding47
  4. Maths47
  5. Knowledge50
  6. Human preference58

Reasoning-effort configurations

The same model behaves differently depending on how much it is allowed to think. Each row is one setting, scored only on the benchmarks that were run at that setting. “Default” means the publisher did not say which setting was used.

EffortIndexRankSpeedFirst answerChat reply costCategories
no reasoning41 tok/s0.56 s$0.0006Maths 37
defaultbest51.8#26541 tok/s0.56 s$0.0006Coding 47 · Human preference 58 · Knowledge 50 · Maths 47 · Reasoning 59

Benchmark results

One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.

Reasoning

Benchmarkno reasoningdefaultSourceTrend
GPQA Diamond82.3%#101Epoch AI Benchmarking Hub
LMArena Hard Prompts1416#137LMArena
GPQA Diamond (Vals)not in index82.8%#58Vals AI

Coding

Benchmarkno reasoningdefaultSourceTrend
LMArena Coding1437#142LMArena
LMArena WebDev1238#109LMArena
LiveCodeBench83.3%#47Vals AI
SWE-bench (Vals)not in index64.4%#71Vals AI

Maths

Benchmarkno reasoningdefaultSourceTrend
FrontierMath Tiers 1–318.3%#809.5%#91Epoch AI Benchmarking Hub
OTIS Mock AIME84.4%#83Epoch AI Benchmarking Hub
AIME (Vals)92.5%#19Vals AI

Knowledge

Benchmarkno reasoningdefaultSourceTrend
SimpleQA Verified20.3%#62Epoch AI Benchmarking Hub
MMLU-Pro84.1%#65Vals AI
LegalBench84.3%#32Vals AI
CorpFin63.6%#44Vals AI
TaxEval72.2%#67Vals AI

Human preference

Benchmarkno reasoningdefaultSourceTrend
LMArena Text1397#134LMArena

Composite

Benchmarkno reasoningdefaultSourceTrend
Epoch Capabilities Indexnot in index144.0#77Epoch AI Benchmarking Hub

Where to run it

Every provider serving this model through OpenRouter, with throughput and first-token latency measured on live traffic over the last 30 minutes and each provider’s own price. Purple marks the best in each column.

ProviderSpeedFirst tokenInput $/MOutput $/MContextQuantisation
Alibaba Cloud Int.41 tok/s0.56 s$0.065$0.2601M

Price history

Listed price per 1M tokens over time, as recorded by OpenRouter for the provider with the longest history.

$0.00$0.110$0.220$0.330$0.440Feb 26Mar 26Apr 26May 26Jun 26Jul 26Aug 26
input outputnow $0.065 in · $0.260 out

What a task costs

Estimates from list price, output speed and time to first answer for the best configuration. “With caching” assumes three-quarters of the input is served from the prompt cache. Reasoning tokens are not modelled.

WorkloadTokens in / outCostWith cachingTime
Chat reply400 / 300$0.00067.9 s
Summarise a 30-page report12,000 / 600$0.003115.2 s
Code edit6,000 / 1,500$0.003637.1 s
Agentic coding session60,000 / 4,000$0.0171.6 min
Structured extraction2,000 / 200$0.00075.4 s

See also

Data as of 9 Sept 2026. Compare these configurations.