Head-to-head comparison

Qwen3.8 Flash vs Grok 4.6

Qwen3.8 Flash (Qwen) and Grok 4.6 (xAI) 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 3 September 2026

As of 3 September 2026, Grok 4.6 holds the stronger ModelCap Index position (#16 vs #17); Qwen3.8 Flash is 12.8× cheaper per output token ($0.47/1M vs $6.00/1M); and Qwen3.8 Flash offers the longer context window (1M vs 500K tokens).

Which should you choose?

Choose Qwen3.8 Flash if…

API cost matters — $0.47/1M output tokens against $6.00/1M, about 12.8× cheaper.
your workload is prompt-heavy — input tokens cost $0.15/1M against $2.00/1M.
you need the longer context window — 1M tokens against 500K.
you want the more recently listed model — Qwen3.8 Flash was listed 26 August 2026, Grok 4.6 12 August 2026.

Choose Grok 4.6 if…

you want the stronger overall ModelCap Index position — #16 against #17 (73.2 vs 72.1 points).
you want provider choice — 2 listed API providers against 1.
AA Intelligence Index is your yardstick — 60.9 against 55.8.
AA Terminal-Bench 2.1 is your yardstick — 88.4% against 86.1%.
AA Humanity's Last Exam is your yardstick — 42.9% against 38.0%.

Qwen3.8 Flash vs Grok 4.6: specs, pricing and context

Specification comparison of Qwen3.8 Flash and Grok 4.6
Field	Qwen3.8 FlashQwen	Grok 4.6xAI
ModelCap Index position	#17	#16
Index score	72.1	73.2
Evidence	Measured	Measured
Input price / 1M tokens	$0.15	$2.00
Output price / 1M tokens	$0.47	$6.00
Context window	1M tokens	500K tokens
Max output tokens	131K	450K
API providers listed	1	2
Weight access	Restricted license	API only
Input modalities	Text, Image, Video	Text, Image, File
First listed	26 August 2026	12 August 2026
Publisher	Qwen	xAI

Evidence: 1 public benchmark observation across 1 board · 6 public benchmark observations across 6 boards. Prices are the lowest listed API offer per million tokens observed on the OpenRouter catalogue.

Benchmark scores: Qwen3.8 Flash vs Grok 4.6

Public benchmark boards where Qwen3.8 Flash or Grok 4.6 has a published result
Board	Qwen3.8 Flash	Grok 4.6	Leads
Arena codingArena (LMArena)	—	15111490–1532High	Only one result
LMArena AgentLMArena	—	5.8%4.5%–7.0%X-High	Only one result
ARC-AGI-2ARC Prize Foundation	—	67.1%X-High	Only one result
ARC-AGI-3ARC Prize Foundation	—	2.1%X-High	Only one result
AA Intelligence IndexArtificial Analysis	55.8intelligence-index	60.9intelligence-index	Grok 4.6
AA Terminal-Bench 2.1Artificial Analysis	86.1%terminal-bench-2.1	88.4%terminal-bench-2.1	Grok 4.6
AA Humanity's Last ExamArtificial Analysis	38.0%humanitys-last-exam	42.9%humanitys-last-exam	Grok 4.6
Terminal-Bench 4.0Terminal-Bench (Laude Institute)	—	20.3%17.2%–23.4%Grok Build · High	Only one result

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.

Qwen3.8 Flash vs Grok 4.6: common questions

Is Qwen3.8 Flash better than Grok 4.6?

Grok 4.6 ranks higher on the ModelCap Index as of 3 September 2026: #16 against #17. 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 Qwen3.8 Flash cheaper than Grok 4.6?

Qwen3.8 Flash is cheaper on output tokens: $0.47/1M against $6.00/1M. Input tokens are $0.15/1M for Qwen3.8 Flash and $2.00/1M for Grok 4.6. Prices are the lowest listed API offer ModelCap observed, in USD per million tokens.

Which has the bigger context window, Qwen3.8 Flash or Grok 4.6?

Qwen3.8 Flash has the larger context window: 1M tokens against 500K.

Which is better for coding, Qwen3.8 Flash or Grok 4.6?

AA Terminal-Bench 2.1: Qwen3.8 Flash 86.1%, Grok 4.6 88.4% — Grok 4.6 leads.

Are Qwen3.8 Flash and Grok 4.6 open-weight models?

Qwen3.8 Flash: Restricted license. Grok 4.6: API only. 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 Qwen3.8 Flash and Grok 4.6?

ModelCap currently lists 1 API provider for Qwen3.8 Flash and 2 for Grok 4.6, from the OpenRouter catalogue snapshot the site serves; each model page lists the providers and their prices.

How current is this Qwen3.8 Flash vs Grok 4.6 comparison?

Every figure comes from the sealed ModelCap dataset published 3 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.