Grok 4.20

Tool callingStructured outputReasoningImage inputFile input

Context: 2M
Released: 7mo ago
Input / 1M tokens: $1.25
Output / 1M tokens: $2.50
Cached input / 1M tokens: $0.20

Benchmarks

DeepSWE is the primary coding benchmark where an exact model evaluation exists. Other sourced evaluations appear below; missing scores are not zero.

Not evaluated in DeepSWE 1.1 as of 2026-09-22. Results are only shown for exact model versions in the official dataset. Official leaderboard.

Other published benchmarks

Evaluation	Reported score and source
ARC-AGI-2	65.1% Third-party evaluator · grok-4-20 External evaluation via Epoch AI Original-source terms apply
Terminal Bench	57.3% https://www.tbench.ai/leaderboard/terminal-bench/2.0 · grok-4-20 Agent: Grok CLI https://www.tbench.ai/leaderboard/terminal-bench/2.0 Original-source terms apply
Terminal Bench	57.3% https://www.tbench.ai/leaderboard/terminal-bench/2.0 · grok-4-20 Agent: grok-cli https://www.tbench.ai/leaderboard/terminal-bench/2.0 Original-source terms apply

Benchmark compilation: Epoch AI, Capabilities & benchmarking (CC BY attribution). Scores are converted to percentages and model names matched to the Vertical Tabs catalog. Individual evaluations are credited to their original sources. External results may carry separate licences and evaluation configurations; do not interpret scores from different harnesses as directly comparable.

Specifications

Developer: xAI
Model family: Grok
Type: Language model
Predecessor: —
Successor: —
Released: March 10, 2026
Model ID: x-ai/grok-4.20
Openness: Closed
License: —
Input modalities: text, image, file
Output modalities: text
Modality: text+image+file->text
Tokenizer: Grok
Max output tokens: 1.8M
Knowledge cutoff: 2025-09-01
Hugging Face: —
Source freshness: Endpoints synced Oct 15, 2026, 10:17 AM UTC

Infrastructure

Provider availability

All providers

Provider	Endpoint	Context	Input /M tokens	Output /M tokens	Cached input /M tokens	Cache write /M tokens	Uptime 1d	Data handling
xAI	xai/zdr	2M	$1.25	$2.50	$0.20	—	99.51%	ZDR: Yes Training: Unknown Prompt logging: Unknown Retention: Unknown ZDR source Privacy policy Checked 2026-10-15
xAI	xai	2M	$1.25	$2.50	$0.20	—	99.93%	ZDR: No Training: Unknown Prompt logging: Unknown Retention: Unknown ZDR source Privacy policy Checked 2026-10-15
xAI	xai/zdr/priority	2M	$2.50	$5.00	$0.40	—	100.00%	ZDR: Yes Training: Unknown Prompt logging: Unknown Retention: Unknown ZDR source Privacy policy Checked 2026-10-15
xAI	xai/priority	2M	$2.50	$5.00	$0.40	—	100.00%	ZDR: No Training: Unknown Prompt logging: Unknown Retention: Unknown ZDR source Privacy policy Checked 2026-10-15

Provider data:OpenRouter