Grok 4.20 Multi-Agent
xAI · Multimodal · Released Mar 2026
xAI's multi-agent reasoning model with a 2 million token context window, released before Grok 4.3.
- Strengths
- Handles extremely long contexts and can coordinate multiple reasoning steps across extended documents or code bases.
- Best for
- Tasks requiring analysis of massive codebases, long document processing, or multi-step reasoning workflows where context size is the primary constraint.
- Limitations
- Superseded by Grok 4.3 in general capability despite its larger context window; reasoning performance lags behind Grok 4.5 and Grok 4.6.
Input / 1M
$1.25
Output / 1M
$2.50
Cached input / 1M
$0.2
Context window
2M
Price history
Input (solid)Output (dashed)
Price change
- 30d
- in — out —
- 90d
- in decreased 37.5% out decreased 58.3%
- 1y
- in decreased 37.5% out decreased 58.3%
- Since launch
- in decreased 37.5% out decreased 58.3%
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 16 Jun 2026 | $1.25 | $2.50 | $0.2 | Imported from OpenRouter | openrouter.ai |
| 11 Jun 2026 | $2.00 | $6.00 | $0.2 | Imported from OpenRouter | openrouter.ai |