Grok 4.3 vs Grok 4.20 (Non-Reasoning)
Grok 4.3 comes out ahead, 56 to 53 on our weighted score.
- Our pick
xAIGrok 4.3
56/100- ECI149.2
- Price$1.25 / $2.50
- Context1M
- xAI
Grok 4.20 (Non-Reasoning)
53/100- ECI—
- Price$1.25 / $2.50
- Context1M
Add a model
Make it a three-way comparison.
Grok 4.3 is our pick
Grok 4.3 is the better all-round choice, scoring 56/100 against Grok 4.20 (Non-Reasoning) (53). It leads on inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceSame priceGrok 4.3 $1.56 · Grok 4.20 (Non-Reasoning) $1.56 per 1M tokens (3:1 blend)
- Longest contextAbout the sameGrok 4.3 1,000,000 · Grok 4.20 (Non-Reasoning) 1,000,000 tokens
- Widest inputsSame inputsGrok 4.3: Text, Images, PDFs · Grok 4.20 (Non-Reasoning): Text, Images, PDFs
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Grok 4.3 | Grok 4.20 (Non-Reasoning) |
|---|---|---|---|
| Price | 50% | 41 | 41 |
| Inputs & features | 30% | 80 | 70 |
| Context window | 20% | 60 | 60 |
| Overall | 100% | 56/100 | 53/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Grok 4.3xAI | Grok 4.20 (Non-Reasoning)xAI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | 149.2 | — |
| ECI rank | #55 of 148 | — |
| GPQA DiamondGraduate-level science questions | 88.8% | — |
| FrontierMath Tiers 1–3Research-level mathematics | 42.8% | — |
| OTIS Mock AIME 2024–2025Competition mathematics | 93.3% | — |
| SimpleQA VerifiedShort factual questions | 33.2% | — |
| Price per million tokens | ||
| Input | $1.25 | $1.25 |
| Output | $2.50 | $2.50 |
| Cached input | $0.20 | $0.20 |
| Blended (3:1) | $1.56 | $1.56 |
| Long-context rate | Over 200K: $2.50 / $5.00 | Over 200K: $2.50 / $5.00 |
| Price source | Official xAI API | Official xAI API |
| Limits | ||
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Max output | 30,000 tokens | 30,000 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | Yes | Yes |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yeslow · medium · high | No |
| Tool calling | Yes | Yes |
| Structured output | Yes | Yes |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | grok-4.3 | grok-4.20-0309-non-reasoning |
| API providers | 27 (best) | 10 |
| Released | Apr 17, 2026 | Mar 9, 2026 |
| Knowledge cutoff | — | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Grok 4.3$17.50
- Grok 4.20 (Non-Reasoning)$17.50
Which should you choose?
Which is better: Grok 4.3 or Grok 4.20 (Non-Reasoning)?
Grok 4.3 is the better all-round choice, scoring 56/100 against Grok 4.20 (Non-Reasoning) (53). It leads on inputs & features. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Grok 4.3 or Grok 4.20 (Non-Reasoning)?
Grok 4.3 and Grok 4.20 (Non-Reasoning) cost the same: $1.25 input / $2.50 output per million tokens.
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Grok 4.3 has an ECI of 149.2 and Grok 4.20 (Non-Reasoning) has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Grok 4.3 and Grok 4.20 (Non-Reasoning) yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
Grok 4.3 and Grok 4.20 (Non-Reasoning) share the same 1,000,000-token context window. Maximum output per response: Grok 4.3 up to 30,000, Grok 4.20 (Non-Reasoning) up to 30,000 tokens.
Which can read images, PDFs, audio or video?
Grok 4.3 accepts text, images and PDFs; Grok 4.20 (Non-Reasoning) accepts text, images and PDFs. They handle the same number of input types.
Are any of these open source?
No. Grok 4.3 and Grok 4.20 (Non-Reasoning) are proprietary and only available through APIs and apps.
Which is newer?
Grok 4.3 is the newest, released Apr 17, 2026. Grok 4.20 (Non-Reasoning) came out Mar 9, 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.
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