Provider

xAI

Every xAI model UltraGPT can reach, kept in sync with the live catalog — pricing, context window and capabilities for each one.

8 models from xAI Up to 2M tokens of context
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8

Models tracked

1

Providers

8

Reasoning models

8

See images (vision)

2,000K

Largest context window

0

Free to run

Directory

All xAI models.

Search and filter this provider's lineup — pricing per million tokens, context window, modalities, reasoning effort and independent benchmark scores where available.

8 of 8 models

Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...

ReasoningTool callingVisionStreamingJSON mode
Context window2M tok
Max output1.80M tok
ReleasedMar 31, 2026
Knowledge cutoffSep 1, 2025
Text + Image + FileText
Input$1.25 / 1M tok
Output$2.5 / 1M tok
Cache read$0.2 / 1M tok

Design Arena — ranked #12 across 14 categories

Grok 4.20 Multi-Agent is a variant of SpaceXAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information...

ReasoningVisionStreamingJSON mode
Context window2M tok
Max output1.80M tok
ReleasedMar 31, 2026
Knowledge cutoffSep 1, 2025
Text + Image + FileText
Input$1.25 / 1M tok
Output$2.5 / 1M tok
Cache read$0.2 / 1M tok
Effort: xhigh, high, medium, low · always on

Grok 4.3 is a reasoning model from SpaceXAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...

ReasoningTool callingVisionStreamingJSON mode
Context window1M tok
Max output900K tok
ReleasedApr 17, 2026
Knowledge cutoff
Text + Image + FileText
Input$1.25 / 1M tok
Output$2.5 / 1M tok
Cache read$0.2 / 1M tok
Effort: high, medium, low, none
Intelligence25.4
Coding42.2
Agentic17.2

Design Arena — ranked #8 across 21 categories

Grok 4.3 is a reasoning model from SpaceXAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual...

ReasoningTool callingVisionStreamingJSON mode
Context window1M tok
Max output900K tok
ReleasedApr 30, 2026
Knowledge cutoff
Text + Image + FileText
Input$1 / 1M tok
Output$2 / 1M tok
Cache read$0.16 / 1M tok
Effort: high, medium, low, none
Intelligence25.4
Coding42.2
Agentic17.2

Design Arena — ranked #8 across 21 categories

Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.

ReasoningTool callingVisionStreamingJSON mode
Context window500K tok
Max output450K tok
ReleasedJul 8, 2026
Knowledge cutoff
Text + Image + FileText
Input$2 / 1M tok
Output$6 / 1M tok
Cache read$0.3 / 1M tok
Effort: high, medium, low · always on
Intelligence39.1
Coding72.4
Agentic42.1

Design Arena — ranked #3 across 16 categories

Grok 4.6 is SpaceXAI's smartest model with frontier performance on coding, knowledge work, and STEM.

ReasoningTool callingVisionStreamingJSON mode
Context window500K tok
Max output450K tok
ReleasedAug 12, 2026
Knowledge cutoffFeb 1, 2026
Text + Image + FileText
Input$2 / 1M tok
Output$6 / 1M tok
Cache read$0.5 / 1M tok
Effort: xhigh, high, medium, low · always on
Intelligence44.4
Coding76.8
Agentic53.4

Design Arena — ranked #2 across 15 categories

Grok Build 0.1 is SpaceXAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized for interactive coding...

ReasoningTool callingVisionStreamingJSON mode
Context window256K tok
Max output230.4K tok
ReleasedApr 16, 2026
Knowledge cutoff
Text + Image + FileText
Input$1 / 1M tok
Output$2 / 1M tok
Cache read$0.2 / 1M tok
Coding51.5

This model always redirects to the latest Grok model from xAI.

ReasoningTool callingVisionStreamingJSON mode
Context window500K tok
Max output450K tok
ReleasedJul 8, 2026
Knowledge cutoff
Text + Image + FileText
Input$2 / 1M tok
Output$6 / 1M tok
Cache read$0.5 / 1M tok
Effort: xhigh, high, medium, low · always on

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