Qwen3.8 Max vs Qwen3.5 Flash vs Grok 4.6
Qwen3.5 Flash comes out ahead, 75 to 69 and 65 on our weighted score, and it is the cheaper option too.
Alibaba (Qwen)Qwen3.8 Max
69/100- ECI156.6
- Price$2.00 / $6.00
- Context1M
- Our pickAlibaba (Qwen)
Qwen3.5 Flash
75/100- ECI144.0
- Price$0.10 / $0.40
- Context1M
xAIGrok 4.6
65/100- ECI156.6
- Price$2.00 / $6.00
- Context500K
Qwen3.5 Flash is our pick
Qwen3.5 Flash is the better all-round choice, scoring 75/100 against Qwen3.8 Max (69) and Grok 4.6 (65). It leads on price. Qwen3.8 Max wins on inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityGrok 4.6Capabilities Index (ECI): Grok 4.6 156.6 · Qwen3.8 Max 156.6 · Qwen3.5 Flash 144.0
- Lowest priceQwen3.5 FlashQwen3.5 Flash $0.175 · Qwen3.8 Max $3.00 · Grok 4.6 $3.00 per 1M tokens (3:1 blend)
- Longest contextQwen3.8 Max and Qwen3.5 FlashQwen3.8 Max 1,000,000 · Qwen3.5 Flash 1,000,000 · Grok 4.6 500,000 tokens
- Widest inputsQwen3.8 MaxQwen3.8 Max: Text, Images, PDFs, Video · Qwen3.5 Flash: Text, Images, Video · Grok 4.6: Text, Images
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | Qwen3.8 Max | Qwen3.5 Flash | Grok 4.6 |
|---|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 86 | 71 | 86 |
| Price | 25% | 27 | 86 | 27 |
| Inputs & features | 15% | 90 | 80 | 70 |
| Context window | 10% | 60 | 60 | 48 |
| Overall | 100% | 69/100 | 75/100 | 65/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Qwen3.8 MaxAlibaba (Qwen) | Qwen3.5 FlashAlibaba (Qwen) | Grok 4.6xAI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 156.6 | 144.0 | 156.6 (best) |
| ECI rank | #20 of 148 | #82 of 148 | #19 of 148 (best) |
| GPQA DiamondGraduate-level science questions | 92.7% | 82.3% | 94.0% (best) |
| FrontierMath Tiers 1–3Research-level mathematics | 74.7% (best) | 18.3% | 66.0% |
| OTIS Mock AIME 2024–2025Competition mathematics | 99.4% (best) | 84.4% | 99.2% |
| SimpleQA VerifiedShort factual questions | 45.8% | 20.3% | 49.3% (best) |
| Price per million tokens | |||
| Input | $2.00 | $0.10 (best) | $2.00 |
| Output | $6.00 | $0.40 (best) | $6.00 |
| Cached input | $0.25 | $0.01 (best) | $0.50 |
| Blended (3:1) | $3.00 | $0.175 (best) | $3.00 |
| Long-context rate | Same rate | Same rate | Over 200K: $4.00 / $12.00 |
| Price source | Official Alibaba API | Official Alibaba API | Official xAI API |
| Limits | |||
| Context window | 1,000,000 tokens (best) | 1,000,000 tokens (best) | 500,000 tokens |
| Max output | 131,072 tokens | 65,536 tokens | 500,000 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | Yes | No | No |
| Audio | No | No | No |
| Video | Yes | Yes | No |
| Reasoning | Yeslow · medium · xhigh | Yes | Yeslow · medium · high · xhigh |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | Yes | Yes |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | qwen3.8-max | qwen3.5-flash | grok-4.6 |
| API providers | 25 | 8 | 29 (best) |
| Released | Aug 3, 2026 | Feb 23, 2026 | Aug 12, 2026 |
| Knowledge cutoff | — | — | Feb 1, 2026 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Qwen3.8 Max$32.00
- Qwen3.5 Flash$1.80
- Grok 4.6$32.00
Which should you choose?
Which is better: Qwen3.8 Max, Qwen3.5 Flash or Grok 4.6?
Qwen3.5 Flash is the better all-round choice, scoring 75/100 against Qwen3.8 Max (69) and Grok 4.6 (65). It leads on price. Qwen3.8 Max wins on inputs & features. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, Qwen3.8 Max, Qwen3.5 Flash or Grok 4.6?
Qwen3.5 Flash is cheaper at $0.10 input / $0.40 output per million tokens (official Alibaba API price). Qwen3.8 Max costs $2.00 input / $6.00 output per million tokens (official Alibaba API price); Grok 4.6 costs $2.00 input / $6.00 output per million tokens (official xAI API price). At a typical mix of three input tokens to one output token, that is $0.175 per million tokens for Qwen3.5 Flash versus $3.00 for Qwen3.8 Max (17× as much) and $3.00 for Grok 4.6 (17× as much).
Which scores higher on benchmarks?
Grok 4.6 scores higher on the Capabilities Index (ECI): Grok 4.6 156.6 (#19 of 148), Qwen3.8 Max 156.6 (#20 of 148) and Qwen3.5 Flash 144.0 (#82 of 148). The confidence ranges of the top two overlap (154.7–158.9 vs 154.5–158.8), so treat the gap as small. On individual benchmarks: GPQA Diamond — Grok 4.6 94.0%, Qwen3.8 Max 92.7%, Qwen3.5 Flash 82.3%; FrontierMath Tiers 1–3 — Qwen3.8 Max 74.7%, Grok 4.6 66.0%, Qwen3.5 Flash 18.3%; OTIS Mock AIME 2024–2025 — Qwen3.8 Max 99.4%, Grok 4.6 99.2%, Qwen3.5 Flash 84.4%; SimpleQA Verified — Grok 4.6 49.3%, Qwen3.8 Max 45.8%, Qwen3.5 Flash 20.3%.
Which is better for coding?
There are no published SWE-bench Verified results for Qwen3.8 Max, Qwen3.5 Flash and Grok 4.6 yet, so there is no like-for-like coding score. On overall capability, Grok 4.6 leads, which tends to carry over to coding, but test on your own codebase. All three support tool calling for agent workflows.
Which has the bigger context window?
Qwen3.8 Max and Qwen3.5 Flash have the largest context windows (1,000,000 and 1,000,000 tokens), against 500,000 for Grok 4.6. Maximum output per response: Qwen3.8 Max up to 131,072, Qwen3.5 Flash up to 65,536, Grok 4.6 up to 500,000 tokens.
Which can read images, PDFs, audio or video?
Qwen3.8 Max accepts text, images, PDFs and video; Qwen3.5 Flash accepts text, images and video; Grok 4.6 accepts text and images. Qwen3.8 Max handles the widest range of inputs.
Are any of these open source?
No. Qwen3.8 Max, Qwen3.5 Flash and Grok 4.6 are proprietary and only available through APIs and apps.
Which is newer?
Grok 4.6 is the newest, released Aug 12, 2026. Qwen3.8 Max came out Aug 3, 2026; Qwen3.5 Flash came out Feb 23, 2026. Knowledge cutoff: Grok 4.6 Feb 1, 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
