Last refreshed 2026-05-20. Next refresh: weekly.
Why use Grok 4.20 Multi-Agent on OpenRouter?
OpenRouter offers Grok 4.20 Multi-Agent with pay-as-you-go pricing at $2.00/1M 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 4.20 Multi-Agent across 3 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-4.20-multi-agentx-ai/grok-4.20-multi-agentRequest example
x-ai/grok-4.20-multi-agent.Gotchas
- Use provider model ID "x-ai/grok-4.20-multi-agent", not the LLMReference slug "grok-4.20-multi-agent".
Compare Grok 4.20 Multi-Agent Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| OpenRouter | $2.00 | $6.00 |
| xAI Console | $1.25 | $2.50 |
| Vercel AI Gateway | $1.25 | $2.50 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $2.00 |
| Output tokens | $6.00 |
Capabilities
About Grok 4.20 Multi-Agent
Grok 4.20 Multi-Agent is the extended-context xAI API variant launched around March 10, 2026 as grok-4.20-multi-agent-0309. Its reasoning.effort parameter controls how many collaborating agents are used, and the variant carries a 2M token context window.
FAQ
What does Grok 4.20 Multi-Agent cost on OpenRouter?
On OpenRouter, Grok 4.20 Multi-Agent costs $2 per 1M input tokens and $6 per 1M output tokens.
What is the context window for Grok 4.20 Multi-Agent on OpenRouter?
Grok 4.20 Multi-Agent supports a 2m token context window on OpenRouter.
How does OpenRouter compare to other Grok 4.20 Multi-Agent providers?
Grok 4.20 Multi-Agent is available from 3 providers. The cheapest input pricing is $1.25/1M tokens from xAI Console.
What API model ID do I use for Grok 4.20 Multi-Agent on OpenRouter?
Use the model ID x-ai/grok-4.20-multi-agent when calling OpenRouter's API.
Who created Grok 4.20 Multi-Agent?
Grok 4.20 Multi-Agent was created by xAI as part of the Grok 4 model family.
Is Grok 4.20 Multi-Agent open source?
Grok 4.20 Multi-Agent is not open source; the seed data lists it as proprietary.