Grok 4.3
by SpaceXAIx-ai/grok-4.3
LLMCompare cannot run Grok 4.3 yet.No route to this model is configured on this site yet. Its prices and parameters are listed below for reference.
See the models that can be run nowGrok 4.3 at a glance
- Context length
- 1,000,000 tokens
- Maximum output
- 900,000 tokens
- Accepts
- Text, Image, File
- Returns
- Text
- Features
- ReasoningJSON outputTool callingPrompt cachingImage input
- Reasoning effort levels
highmediumlownoneReasoning can be turned off.- Released
- 30 Apr 2026
- Knowledge cutoff
- Not published
Model facts synced from the OpenRouter model list on 21 Oct 2026.
Grok 4.3 pricing by route
A route is the service LLMCompare calls to reach the model. Grok 4.3 has 1 route. Prices are in US dollars.
| Route | On LLMCompare | Inputper 1M tokens | Outputper 1M tokens | Cache readper 1M tokens | Price verified on | Source |
|---|---|---|---|---|---|---|
| OpenRouterDefault | Not configured | $1.25 | $2.50 | $0.20 | openrouter.ai/x-ai/grok-4.3 |
The cost shown in an LLMCompare report is calculated from these prices as they were at the time of the run.
Cost calculator
Estimate what a batch of calls to Grok 4.3 costs. The starting numbers are examples. Change them to match your task.
Part of the input tokens above, billed at the cache read price.
Billed in addition to the output tokens.
- Cost per call
- $0.0025
- 3 credits
- Cost of 100 calls
- $0.25
- 300 credits
Calculated from the OpenRouter prices verified on 21 Oct 2026. Credits are the cost plus a 20% service fee, at $0.001 per credit, rounded up for each call, with a minimum of 1 per call. A real run is charged for the usage the provider reports.
Parameters you can set
These are the parameters LLMCompare can set when it calls the model through OpenRouter.
| Parameter | Type | Range or options | Default |
|---|---|---|---|
temperature | Number | 0 to 2in steps of 0.1 | Provider default |
top_p | Number | 0 to 1in steps of 0.05 | Provider default |
max_tokens | Integer | 1 to 900,000 | Provider default |
reasoning_effort | One of | highmediumlownone | low |
seed | Integer | -2,147,483,648 to 4,294,967,295 | Provider default |
response_format | One of | textjson_object | Provider default |
About Grok 4.3
Grok 4.3 is a reasoning model from SpaceXAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...
Description as published for this model. LLMCompare has not edited it.
Models to compare with Grok 4.3
Text models from the same provider and models at the nearest price. The order is not a ranking.
| Add to comparison | Model | Context | Max output | Input priceper 1M tokens | Output priceper 1M tokens | Features | Released | On LLMCompare |
|---|---|---|---|---|---|---|---|---|
Grok 4.20 Multi-AgentSpaceXAIx-ai/grok-4.20-multi-agent | 2M | 1.8M | $1.25 | $2.50 | ReasoningJSONCacheVision | No route yet | ||
Grok 4.20SpaceXAIx-ai/grok-4.20 | 2M | 1.8M | $1.25 | $2.50 | JSONToolsCacheVision | No route yet | ||
Grok Build 0.1SpaceXAIx-ai/grok-build-0.1 | 256k | 230k | $1.00 | $2.00 | JSONToolsCacheVision | No route yet | ||
Step 5 PreviewStepFunstepfun/step-5-preview | 1.05M | 64k | $1.00 | $2.70 | ReasoningJSONToolsCacheVision | No route yet | ||
GlimpseElorianelorian/glimpse | 262k | 256k | $0.60 | $3.00 | JSONToolsCacheVision | No route yet | ||
Qwen3 235B A22B Thinking 2507Qwenqwen/qwen3-235b-a22b-thinking-2507 | 128k | 16.4k | $0.45 | $3.50 | Tools | No route yet |
Questions about Grok 4.3
- How much does Grok 4.3 cost?
- On the OpenRouter route, Grok 4.3 costs $1.25 per 1 million input tokens and $2.50 per 1 million output tokens, in US dollars. Input tokens that Grok 4.3 reads from the prompt cache cost $0.20 per 1 million tokens. LLMCompare verified this price on 21 Oct 2026.
- What is the context length of Grok 4.3?
- Grok 4.3 has a context length of 1,000,000 tokens and returns up to 900,000 output tokens in one call.
- What inputs does Grok 4.3 accept?
- Grok 4.3 accepts these inputs: Text, Image, File. Grok 4.3 returns: Text.
- Which reasoning effort levels does Grok 4.3 support?
- Grok 4.3 supports these reasoning effort levels: high, medium, low, none. Reasoning can be turned off for Grok 4.3.
- Can I test Grok 4.3 on my own data?
- Not yet. LLMCompare lists the prices and parameters of Grok 4.3, but no route to Grok 4.3 is configured on LLMCompare, so it cannot be selected for an evaluation.