// model_detail
active frontier
Grok 4.20
by xAI
xAI's newest flagship with industry-leading speed and agentic tool calling. 2M context, lowest hallucination rate.
Context window 2M 2M tokens
Max output 128K 128K tokens
Pricing /1M tok $2.00 in / $6.00 out per 1M tokens (API)
Released Mar 9, 2026
// specifications
Specs & capabilities
API details
- API model ID
grok-4.20- Internal ID
grok-4-20- Status
- active
- Type
- frontier
Capabilities
- Vision
- 👁️ Yes
- Function calling
- 🔧 Yes
- Knowledge cutoff
- 📅 2025-09
Pricing
- Input
- $2.00 / 1M tokens
- Output
- $6.00 / 1M tokens
- Source
- First-party API pricing
Lifecycle
- Predecessor
- Grok 4
// notes
Additional notes
Latest Grok flagship, 2M context
// more_from_xai
More xAI models
Grok 4.20 Multi-Agent active frontier
Variant of Grok 4.20 for collaborative agent-based workflows. Multiple agents operate in parallel.
Grok 4.1 Fast active fast
Fast non-reasoning variant. 2M context. Cost leader among frontier-class providers.
Grok 4 Fast legacy fast
Previous-generation fast Grok. 2M context. Superseded by Grok 4.1 Fast.
Grok Code Fast 1 active coding
xAI's coding-focused model. 256K context, optimized for code generation.
Grok 4 legacy frontier
Previous-generation Grok flagship. 256K context. Superseded by Grok 4.20.
Grok 3 Mini legacy fast
Smaller Grok 3 variant with reasoning. 131K context. Cost-efficient.
// external_links