Last refreshed 2026-06-18. Next refresh: weekly.
Why use Grok 4.3 on OpenRouter?
OpenRouter offers Grok 4.3 with pay-as-you-go pricing at $1.25/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare Grok 4.3 across 5 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: x-ai/grok-4.3x-ai/grok-4.3Request example
x-ai/grok-4.3.Gotchas
- Use provider model ID "x-ai/grok-4.3", not the LLMReference slug "grok-4.3".
Compare Grok 4.3 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| xAI Console | $1.25 | $2.50 |
| OpenRouter | $1.25 | $2.50 |
| Microsoft Foundry | — | — |
| Vercel AI Gateway | $1.25 | $2.50 |
| AWS Bedrock | $1.25 | $2.50 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $1.25 |
| Output tokens | $2.50 |
Capabilities
About Grok 4.3
xAI's Grok 4.3 is the current flagship API chat model for agentic tool calling and instruction following. xAI lists text and image input, text output, configurable reasoning, a 1,000,000 token context window, cached-input pricing, function calling, and structured outputs.
FAQ
What does Grok 4.3 cost on OpenRouter?
On OpenRouter, Grok 4.3 costs $1.25 per 1M input tokens and $2.5 per 1M output tokens.
What is the context window for Grok 4.3 on OpenRouter?
Grok 4.3 supports a 1m token context window on OpenRouter.
How does OpenRouter compare to other Grok 4.3 providers?
Grok 4.3 is available from 5 providers. The cheapest input pricing is $1.25/1M tokens from xAI Console.
What API model ID do I use for Grok 4.3 on OpenRouter?
Use the model ID x-ai/grok-4.3 when calling OpenRouter's API.
Who created Grok 4.3?
Grok 4.3 was created by xAI as part of the Grok 4 model family.
Is Grok 4.3 open source?
Grok 4.3 is not open source; the seed data lists it as proprietary.