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Qwen

Qwen: Qwen3.8 Flash

Qwen3.8 Flash Overview

Qwen3.8-Flash is a multimodal mixture-of-experts model from the Qwen team at Alibaba, and the production counterpart of the open-weight Qwen3.8-Flash-Next preview that introduces the architecture intended for the Qwen4 family. The main model carries 125 billion parameters alongside a separate 51 billion parameter N-gram embedding table, while activating roughly 6 billion parameters per token. It accepts interleaved image and text input and returns text, handling 262,144 tokens of context natively with extension to 1,000,000 tokens using YaRN. The production configuration runs with the 1M context window by default and adds built-in tool support.

Four architectural changes separate it from earlier Qwen releases: hybrid attention that pairs Gated DeltaNet for history compression with Qwen Sparse Attention, which uses a lightweight indexer to select micro-blocks of context; a Gated Residual scheme; N-gram embeddings; and training with the Muon optimizer, refined around orthogonalization accuracy and the division of parameters between Muon and AdamW. Qwen reports training cost around one ninth that of Qwen3.7-Plus, with QSA attention kernels measured up to 7.6 times faster in prefill and 4.9 times faster in decode at 1M-token context. Reported scores include 58.7 on DeepSWE 1.1, 62.5 on SWE-bench Pro, 84.5 on AndroidWorld and 95.7 on MathVision.

Qwen3.8 Flash Interactive Demo

Model settings

Thinking level

Max output tokens

Default 65,536 · max 65,536

Sign in to adjust thinking and output length per run.

Results appear here. Add an image or pick an example to run Qwen3.8 Flash.

Qwen3.8 Flash Details & Performance

Details

Resources

Vision Tasks

CaptioningChart Question AnsweringClassificationDocument Question AnsweringImage TaggingMulti-Label ClassificationOCRObject DetectionVision LanguageVisual Question Answering

Features

Foundation VisionLLMs with Vision CapabilitiesMultimodal Vision

Usage

Past 30 Days

Performance

Avg. Latency

Qwen3.8 Flash Vision Evals

Vision Evals is Roboflow's ground-truth benchmark: every model runs the same real-world samples across six vision tasks, and answers are scored against ground truth.

Evals updated September 5, 2026Pricing updated September 13, 2026

Overall score#27 of 53
68.8%
Avg cost / sample#5 of 53
$0.0004
Avg speed / sample#12 of 53
6.48s
Avg tokens / sample
1.6K

Strengths and weaknesses

Qwen3.8 Flash averages 68.8% across the six Vision Evals tasks, ranking #27 of 53 models overall.

Its weakest relative showing is Reasoning, ranking #41 of 53 at 35.1%.

At $0.0004 per sample it is the 5th cheapest of the 53 benchmarked models, and its average inference time of 6.5s per sample makes it the 12th fastest.

Performance profile

Field medianQwen3.8 Flash

Field medians: Object Detection 53.9%, Counting 56.8%, Identification 84.4%, OCR 88.7%, Data Extraction 84.5%, Reasoning 54.1%.

Results by task

TaskScoreField (0 to 100)RankCost / sampleSpeed
Object Detection (low)
59.8%
±1.1, Mean of 3 runs, range 58.5 to 60.8
#14 of 53$0.000610.37s
Object Detection (high)
67.0%
±1.6, Mean of 3 runs, range 65.3 to 68.5
#8 of 17$0.001015.78s
Counting (low)
56.3%
±2.7, Mean of 3 runs, range 54.0 to 59.5
#29 of 53$0.00024.97s
Counting (high)
68.0%
±0.7, Mean of 3 runs, range 67.6 to 68.9
#13 of 17$0.000816.66s
Identification (low)
88.5%
±1.6, Mean of 3 runs, range 87.5 to 90.6
#18 of 53$0.00013.75s
Identification (high)
86.5%
±3.1, Mean of 3 runs, range 84.4 to 90.6
#13 of 17$0.00035.76s
OCR (low)
88.0%
±1.0, Mean of 3 runs, range 86.8 to 88.9
#33 of 53$0.00036.70s
OCR (high)
91.3%
±0.5, Mean of 3 runs, range 90.8 to 91.9
#8 of 17$0.00059.12s
Data Extraction (low)
84.9%
±1.5, Mean of 3 runs, range 83.5 to 86.6
#23 of 53$0.00023.21s
Data Extraction (high)
84.5%
±1.0, Mean of 3 runs, range 83.5 to 85.6
#13 of 17$0.00033.79s
Reasoning (low)
35.1%
±3.3, Mean of 3 runs, range 31.1 to 37.8
#41 of 53$0.00023.39s
Reasoning (high)
69.5%
±0.7, Mean of 3 runs, range 68.9 to 70.2
#17 of 39$0.001123.61s
  • Thinking longer helps: 7.2 points higher on object detection at high effort for 1.6x the cost and 1.5x the latency.
  • Thinking longer helps: 11.7 points higher on counting at high effort for 4.9x the cost and 3.3x the latency.
  • Thinking longer does not help: 2.1 points lower on identification at high effort for 2.2x the cost and 1.5x the latency.
  • Thinking longer helps: 3.3 points higher on ocr at high effort for 1.5x the cost and 1.4x the latency.
  • Thinking longer does not help: 0.3 points lower on data extraction at high effort for 1.6x the cost and 1.2x the latency.
  • Thinking longer helps: 34.4 points higher on reasoning at high effort for 6.6x the cost and 7x the latency.

Price vs. performance

Score vs. cost

Overall benchmark score against estimated cost per sample, on a log scale. Upper-left is the sweet spot: high quality at low cost.

52 models on the current benchmark · scores and efficiency pooled across all six tasks at low effort · Qwen3.8 Flash highlighted

Qwen3.8 Flash scores are the mean of 3 runs per task at both low and high effort · Methodology

View all Vision Evals →

Qwen3.8 Flash Pricing

Qwen3.8 Flash costs $0.150 per 1M input tokens and $0.470 per 1M output tokens.

Input$0.150 / 1M tokens
Output$0.470 / 1M tokens
Cached input$0.016 / 1M tokens

Pricing updated Sep 13, 2026

Alternatives to Qwen3.8 Flash

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Google
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OpenAI
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Anthropic
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Claude Sonnet 5 is a mid-tier large language model from Anthropic, released on June 30, 2026, as the latest model in the Sonnet series and a direct successor to Claude Sonnet 4.6. It is a hybrid reasoning model designed primarily for agentic workflows, software coding, and professional tasks. The model features a 1 million token context window, a 128k maximum output token limit, and runs adaptive thinking by default, giving API users fine-grained control over reasoning effort across five levels (low, medium, high, max, and extra-high). It uses an updated tokenizer shared with Opus 4.7 and later models, which produces approximately 30% more tokens for equivalent text compared to earlier Claude models. On benchmarks, Sonnet 5 scores 63.2% on agentic coding and 81.2% on OSWorld, narrowing the gap with Opus 4.8 while remaining at Sonnet-tier pricing.The model supports text and image input with text output, and accepts tools including browsers and terminals for autonomous multi-step task execution. Anthropic's safety evaluations report that Sonnet 5 shows a lower rate of undesirable behaviors than Sonnet 4.6 and is generally safer in agentic contexts, with improved resistance to prompt injection and reduced sycophancy. Cybersecurity safeguards equivalent to those on Opus 4.7 and 4.8 are active, though Anthropic notes the model was not deliberately trained on cybersecurity tasks. The model is proprietary and API-only, with no open weights.
Z.ai
GLM 5.3 Flash
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Grok
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Qwen
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Qwen3.7 Flash is the low-latency, cost-oriented tier of Alibaba's Qwen3.7 series, a vision-language reasoning model that accepts interleaved text and image input and returns text. It is built as a hybrid thinking model: like the rest of the Qwen3.7, Qwen3.6, and Qwen3.5 families served through Alibaba Cloud Model Studio, it can either emit an explicit reasoning trace before answering or respond directly, with thinking behavior controlled by an enable_thinking switch that defaults to on for the Qwen3.7 generation. The model exposes a context window of roughly one million tokens and a maximum generation length of 65,536 tokens, which allows long multi-image sequences, long documents, and extended agent trajectories to be held in a single request.Functionally, Qwen3.7 Flash targets multimodal agent workloads rather than pure chat. Reported strengths include object recognition, spatial understanding, and perception of real-world scenes, alongside visual coding, search, and computer-use style interaction where the model reads screen content and reasons over interface state. Weights are not published; the model is a proprietary endpoint positioned below Qwen3.7 Plus and Qwen3.7 Max in the same series, and it supports function calling and tool use for agentic pipelines.

Qwen3.8 Flash License

Custom License · Model-specific license

Qwen3.8 Flash ships under a custom, model-specific license rather than a standard permissive or restrictive one, so the Qwen3.8 Flash license has to be read directly. Custom model licenses range from effectively permissive to research-only.

Commercial use
Varies. Custom model licenses commonly restrict commercial use, cap monthly active users, or carve out specific industries — check the Qwen3.8 Flash terms before you build on it.
Modification
Usually permitted for fine-tuning, but check whether derivative weights inherit the same license and naming requirements.
Redistribution
Often restricted. Look for attribution, naming, and acceptable-use requirements that apply to any copy you share.

Uncertainty around licensing can delay or stop a project, and acceptable-use policies attached to custom licenses are binding terms rather than guidance. Review them alongside the Qwen3.8 Flash license before production deployment.

Do I need a commercial license for Qwen3.8 Flash?

If the custom terms rule out your use case, a commercial license from the rights holder is the way through. Roboflow's licensing page lists the supported models whose commercial license is included in a Roboflow plan, so it is worth checking whether Qwen3.8 Flash — or a permissively licensed alternative — fits your deployment.

Do not hesitate to reach out with questions for your commercial project — our team will help you start solving business problems on the first call. See Roboflow commercial licensing for the models included in each plan.

Talk to sales

This model is released under a custom license that does not match a standard open-source identifier. Read the full license text linked from the model documentation.

Custom licenses vary widely in what they permit. Many model-specific custom licenses include commercial-use restrictions (e.g., non-commercial weights, named-user limits, or jurisdiction restrictions). Read the full license before deploying commercially.

Custom licenses are model-specific. Always check the per-model License Notes section above and the linked official license text.

License information is provided as a guide and is not legal advice.

Frequently Asked Questions About Qwen3.8 Flash Vision

Yes. Qwen3.8 Flash accepts image input and handles OCR, data extraction, object counting, identification, visual reasoning, and object detection. On Roboflow's Vision Evals its strongest task is Object Detection at 59.8% (#14 of 53 at low effort). You can test it on your own image in the demo above.

Yes. its transcriptions match the ground truth 88% on average (#33 of 53 at low effort) on Vision Evals OCR. Pulling specific fields out of documents (data extraction) scores 84.9%.

Not its strength. On Vision Evals, Qwen3.8 Flash scores 59.8% mAP@50 on object detection (#14 of 53 at low effort) and 56.3% judge-graded accuracy on object counting. For production counting or precise localization, pairing it with a specialized detector like RF-DETR or your own trained model in a Roboflow Workflow is usually more reliable: detect the objects, then count the detections.

On our benchmark's task mix, Qwen3.8 Flash averages $0.0004 per sample at $0.15 per 1M input and $0.47 per 1M output tokens (#5 of 53 on cost), with an average speed of 6.5s per sample across the benchmark. Actual cost depends on your images and prompts.

On the overall Vision Evals ranking, Qwen3.8 Flash sits #27 of 53 at 68.8%, just behind Qwen3.5 35B-A3B (69.4%) and just ahead of Claude Opus 4.8 (68.7%). See the full side-by-side: Qwen3.8 Flash vs Qwen3.5 35B-A3B.