Grok 4.5 vs Qwen3.8 Max vs Gemini 3.5 Flash
Too close to call on our weighted score (Qwen3.8 Max 69, Gemini 3.5 Flash 69, Grok 4.5 64). The right pick depends on what you value most.
xAIGrok 4.5
64/100- ECI154.0
- Price$2.00 / $6.00
- Context500K
Alibaba (Qwen)Qwen3.8 Max
69/100- ECI156.6
- Price$2.00 / $6.00
- Context1M
GoogleGemini 3.5 Flash
69/100- ECI154.5
- Price$1.50 / $9.00
- Context1.05M
Too close to call
It is close. Our weighted score puts them within a point (Qwen3.8 Max 69/100, Gemini 3.5 Flash 69/100, Grok 4.5 64/100), so choose by what matters most for your work: Qwen3.8 Max for raw capability, Grok 4.5 on price and Gemini 3.5 Flash for long inputs. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
- CapabilityQwen3.8 MaxCapabilities Index (ECI): Qwen3.8 Max 156.6 · Gemini 3.5 Flash 154.5 · Grok 4.5 154.0
- Lowest priceGrok 4.5 and Qwen3.8 MaxGrok 4.5 $3.00 · Qwen3.8 Max $3.00 · Gemini 3.5 Flash $3.38 per 1M tokens (3:1 blend)
- Longest contextGemini 3.5 FlashGemini 3.5 Flash 1,048,576 · Qwen3.8 Max 1,000,000 · Grok 4.5 500,000 tokens
- Widest inputsGemini 3.5 FlashGrok 4.5: Text, Images · Qwen3.8 Max: Text, Images, PDFs, Video · Gemini 3.5 Flash: Text, Images, PDFs, Audio, Video
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | Grok 4.5 | Qwen3.8 Max | Gemini 3.5 Flash |
|---|---|---|---|---|
| CapabilityCapabilities Index (ECI) | 50% | 83 | 86 | 84 |
| Price | 25% | 27 | 27 | 25 |
| Inputs & features | 15% | 70 | 90 | 100 |
| Context window | 10% | 48 | 60 | 61 |
| Overall | 100% | 64/100 | 69/100 | 69/100 |
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Grok 4.5xAI | Qwen3.8 MaxAlibaba (Qwen) | Gemini 3.5 FlashGoogle |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | 154.0 | 156.6 (best) | 154.5 |
| ECI rank | #36 of 148 | #20 of 148 (best) | #33 of 148 |
| GPQA DiamondGraduate-level science questions | 93.4% (best) | 92.7% | 92.8% |
| FrontierMath Tiers 1–3Research-level mathematics | 57.2% | 74.7% (best) | 62.8% |
| OTIS Mock AIME 2024–2025Competition mathematics | 97.8% | 99.4% (best) | 95.6% |
| SWE-bench VerifiedFixing real GitHub issues | — | — | 79.3% |
| SimpleQA VerifiedShort factual questions | 48.3% | 45.8% | 66.2% (best) |
| Price per million tokens | |||
| Input | $2.00 | $2.00 | $1.50 (best) |
| Output | $6.00 (best) | $6.00 (best) | $9.00 |
| Cached input | $0.30 | $0.25 | $0.15 (best) |
| Blended (3:1) | $3.00 (best) | $3.00 (best) | $3.38 |
| Long-context rate | Over 200K: $4.00 / $12.00 | Same rate | Same rate |
| Price source | Official xAI API | Official Alibaba API | Official Google API |
| Limits | |||
| Context window | 500,000 tokens | 1,000,000 tokens | 1,048,576 tokens (best) |
| Max output | 500,000 tokens (best) | 131,072 tokens | 65,536 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | Yes | Yes |
| PDFs | No | Yes | Yes |
| Audio | No | No | Yes |
| Video | No | Yes | Yes |
| Reasoning | Yeslow · medium · high | Yeslow · medium · xhigh | Yesminimal · low · medium · high |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | Yes | Yes |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | grok-4.5 | qwen3.8-max | gemini-3.5-flash |
| API providers | 24 | 25 | 32 (best) |
| Released | Jul 8, 2026 | Aug 3, 2026 | May 19, 2026 |
| Knowledge cutoff | — | — | Jan 2025 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Grok 4.5$32.00
- Qwen3.8 Max$32.00
- Gemini 3.5 Flash$33.00
Which should you choose?
Which is better: Grok 4.5, Qwen3.8 Max or Gemini 3.5 Flash?
It is close. Our weighted score puts them within a point (Qwen3.8 Max 69/100, Gemini 3.5 Flash 69/100, Grok 4.5 64/100), so choose by what matters most for your work: Qwen3.8 Max for raw capability, Grok 4.5 on price and Gemini 3.5 Flash for long inputs. The score weighs capability 50%, price 25%, inputs & features 15%, context window 10%.
Which is cheaper, Grok 4.5, Qwen3.8 Max or Gemini 3.5 Flash?
Grok 4.5 is cheaper at $2.00 input / $6.00 output per million tokens (official xAI API price). Qwen3.8 Max costs $2.00 input / $6.00 output per million tokens (official Alibaba API price); Gemini 3.5 Flash costs $1.50 input / $9.00 output per million tokens (official Google API price). At a typical mix of three input tokens to one output token, that is $3.00 per million tokens for Grok 4.5 versus $3.00 for Qwen3.8 Max (1× as much) and $3.38 for Gemini 3.5 Flash (1.1× as much).
Which scores higher on benchmarks?
Qwen3.8 Max scores higher on the Capabilities Index (ECI): Qwen3.8 Max 156.6 (#20 of 148), Gemini 3.5 Flash 154.5 (#33 of 148) and Grok 4.5 154.0 (#36 of 148). The confidence ranges of the top two overlap (154.5–158.8 vs 152.5–156.6), so treat the gap as small. On individual benchmarks: GPQA Diamond — Grok 4.5 93.4%, Gemini 3.5 Flash 92.8%, Qwen3.8 Max 92.7%; FrontierMath Tiers 1–3 — Qwen3.8 Max 74.7%, Gemini 3.5 Flash 62.8%, Grok 4.5 57.2%; OTIS Mock AIME 2024–2025 — Qwen3.8 Max 99.4%, Grok 4.5 97.8%, Gemini 3.5 Flash 95.6%; SimpleQA Verified — Gemini 3.5 Flash 66.2%, Grok 4.5 48.3%, Qwen3.8 Max 45.8%.
Which is better for coding?
There are no published SWE-bench Verified results for Grok 4.5 and Qwen3.8 Max yet, so there is no like-for-like coding score. On overall capability, Qwen3.8 Max 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?
Gemini 3.5 Flash has the largest context window at 1,048,576 tokens, against 1,000,000 for Qwen3.8 Max and 500,000 for Grok 4.5. Maximum output per response: Grok 4.5 up to 500,000, Qwen3.8 Max up to 131,072, Gemini 3.5 Flash up to 65,536 tokens.
Which can read images, PDFs, audio or video?
Grok 4.5 accepts text and images; Qwen3.8 Max accepts text, images, PDFs and video; Gemini 3.5 Flash accepts text, images, PDFs, audio and video. Gemini 3.5 Flash handles the widest range of inputs.
Are any of these open source?
No. Grok 4.5, Qwen3.8 Max and Gemini 3.5 Flash are proprietary and only available through APIs and apps.
Which is newer?
Qwen3.8 Max is the newest, released Aug 3, 2026. Grok 4.5 came out Jul 8, 2026; Gemini 3.5 Flash came out May 19, 2026. Knowledge cutoff: Gemini 3.5 Flash Jan 2025.
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.
