Model Library
xAIReleased April 30, 2026Grok 4.3 (medium)
xAI · Released April 30, 2026
Intelligence score
36
At a glance
- Intelligence
- 36
- Speed
- 136.1tokens/sec
- Latency
- 11.47stime to first token
- Input price
- $1.25per 1M tokens
- Output price
- $2.50per 1M tokens
- Context window
- 4tokens
- Parameters
- —
Summary
Comparison summary
Grok 4.3 (medium) scores 36 (estimated) on the Artificial Analysis Intelligence Index, placing it above average among other reasoning models in a similar price tier (median: 28). Grok 4.3 (medium) generates output at 136.1 tokens per second (based on xAI's API), which is above average compared to other reasoning models in a similar price tier (median: 81.2 t/s). Grok 4.3 (medium) costs $1.25 per 1M input tokens (better than average, median: $1.50) and $2.50 per 1M output tokens (very competitive, median: $8.40), based on xAI's API.
Specifications
Technical specifications
| Model name | Grok 4.3 (medium) |
|---|---|
| Provider | xAI |
| Release date | April 30, 2026 |
| Intelligence score | 36 |
| Speed | 136.1 tokens/sec |
| Latency (TTFT) | 11.47s |
| Input price | $1.25 / 1M tokens |
| Output price | $2.50 / 1M tokens |
| Context window | 4 tokens |
| Parameters | — |
| Reasoning | Yes |
| Input modalities | text, image |
| Output modalities | — |
| Open weights | No |
| License | — |
| API availability | — |
| Source | Model Intelligence legacy profile: grok-4-3-medium |
Pricing
Token prices
Price per 1M tokens
Grok 4.3 (medium), as listed in the catalog record
- Input$1.25
- Output$2.50
| Token type | Price per 1M |
|---|---|
| Input | $1.25 |
| Output | $2.50 |
Model Intelligence legacy profile: grok-4-3-medium
FAQ · 18
Frequently asked questions
Grok 4.3 (medium) was released on April 30, 2026.
Grok 4.3 (medium) was created by xAI.
Grok 4.3 (medium) scores 36 (estimated) on the Artificial Analysis Intelligence Index, placing it above average among other reasoning models in a similar price tier (median: 28).
Grok 4.3 (medium) generates output at 136.1 tokens per second (based on xAI's API), which is above average compared to other reasoning models in a similar price tier (median: 81.2 t/s).
Grok 4.3 (medium) has a time to first token (TTFT) of 11.47s (based on xAI's API), which is somewhat higher than average compared to other reasoning models in a similar price tier (median: 2.78s).
Grok 4.3 (medium) costs $1.25 per 1M input tokens (better than average, median: $1.50) and $2.50 per 1M output tokens (very competitive, median: $8.40), based on xAI's API.
Grok 4.3 (medium) costs $1.25 per 1M input tokens and $2.50 per 1M output tokens (based on xAI's API). For a blended rate (7:2:1 cache hit/input/output ratio), this is $0.64 per 1M tokens. Pricing may vary by provider.
Yes, Grok 4.3 (medium) is a reasoning model. It uses extended thinking or chain-of-thought reasoning to work through complex problems before providing an answer.
Grok 4.3 (medium) supports text and image input.
Grok 4.3 (medium) supports text output.
Yes, Grok 4.3 (medium) supports image input and can analyze, describe, and answer questions about images.
Yes, Grok 4.3 (medium) is multimodal. It can process text and image input and generate text output.
Grok 4.3 (medium) has a context window of 1.0M tokens. This determines how much text and conversation history the model can process in a single request.
No, Grok 4.3 (medium) is proprietary. The model weights are not publicly available.
Grok 4.3 (medium) is a proprietary model and xAI has not disclosed the model size or parameter count.
Grok 4.3 (medium) achieves a score of 36 on the Artificial Analysis Intelligence Index. This composite benchmark evaluates models across reasoning, knowledge, mathematics, and coding.
Yes, Grok 4.3 (medium) is available via API through 3 providers.
Grok 4.3 (medium) is available through 3 API providers.