xAI model
Grok 4.3
Model ID: grok-4.3
Grok 4.3 is a xAI model tracked in SteelEngine. It supports a 1M token context window. Pricing starts at $1.25/1M input tokens and $2.5/1M output tokens. Key capabilities include Temperature 0-2, Tool choice, Structured outputs. Best for long-context retrieval, large documents, and high-memory workflows.
Input price
$1.25/1M
Cached input
$0.2/1M
Output price
$2.5/1M
Context window
1M
Pricing and limits
Pricing below is generated directly from the provider registry in SteelEngine. All amounts are listed per one million tokens.
Input price
$1.25/1M
Cached input
$0.2/1M
Output price
$2.5/1M
Updated
May 5, 2026
Context window
1M tokens
Max output
Not published
Provider
xAI
Best for
Best for long-context retrieval, large documents, and high-memory workflows.
Capabilities
These capability flags are generated from the provider and model definitions tracked in SteelEngine.
Temperature
0 to 2
Reasoning effort
Not supported
Verbosity
Not supported
Thinking levels
Not supported
Structured outputs
Supported
Tool choice
Supported
Computer use
Not supported
Deep research
Not supported
Memory support
Supported
Max output tokens
Not published
Related xAI models
Browse comparable models from the same provider to compare pricing, context window, and capability coverage.
Grok 4.1 Fast Reasoning
grok-4-1-fast-reasoning
Grok 4.1 Fast Reasoning is a xAI model tracked in SteelEngine. It supports a 2M token context window. Pricing starts at $1.25/1M input tokens and $2.5/1M output tokens. Key capabilities include Temperature 0-1, Tool choice, Structured outputs.
Grok 4.1 Fast Non Reasoning
grok-4-1-fast-non-reasoning
Grok 4.1 Fast Non Reasoning is a xAI model tracked in SteelEngine. It supports a 2M token context window. Pricing starts at $1.25/1M input tokens and $2.5/1M output tokens. Key capabilities include Temperature 0-1, Tool choice, Structured outputs.
Grok 4 Fast Reasoning
grok-4-fast-reasoning
Grok 4 Fast Reasoning is a xAI model tracked in SteelEngine. It supports a 2M token context window. Pricing starts at $1.25/1M input tokens and $2.5/1M output tokens. Key capabilities include Temperature 0-1, Tool choice, Structured outputs.
Grok 4 Fast Non Reasoning
grok-4-fast-non-reasoning
Grok 4 Fast Non Reasoning is a xAI model tracked in SteelEngine. It supports a 2M token context window. Pricing starts at $1.25/1M input tokens and $2.5/1M output tokens. Key capabilities include Temperature 0-1, Tool choice, Structured outputs.
Grok 4.20 0309 Reasoning
grok-4.20-0309-reasoning
Grok 4.20 0309 Reasoning is a xAI model tracked in SteelEngine. It supports a 2M token context window. Pricing starts at $1.25/1M input tokens and $2.5/1M output tokens. Key capabilities include Temperature 0-1, Tool choice, Structured outputs.
Grok 4.20 0309 Non Reasoning
grok-4.20-0309-non-reasoning
Grok 4.20 0309 Non Reasoning is a xAI model tracked in SteelEngine. It supports a 2M token context window. Pricing starts at $1.25/1M input tokens and $2.5/1M output tokens. Key capabilities include Temperature 0-1, Tool choice, Structured outputs.
Frequently asked questions
Grok 4.3 is a xAI model available in SteelEngine. Grok 4.3 is a xAI model tracked in SteelEngine. It supports a 1M token context window. Pricing starts at $1.25/1M input tokens and $2.5/1M output tokens. Key capabilities include Temperature 0-2, Tool choice, Structured outputs.