---
id: "x-ai/grok-4.3"
also: ["x-ai/grok-4.3-20260430", "requesty/xai/grok-4.3", "vercel/spacexai/grok-4.3", "vercel/xai/grok-4.3"]
card_usd_per_m: "1.25 in, 2.5 out, at xai"
cheapest_list_usd_per_m: "1.25 in, 2.5 out, at xai on openrouter"
cheapest_effective_usd_per_m: "0.8409 in, 2.5 out, at xai on requesty"
context: 1000000
max_output: 900000
input: ["text", "image", "file"]
output: ["text"]
released: "2026-04-30"
reasoning: ["high", "medium", "low", "none"]
api: ["/api/v1/chat/completions", "/api/v1/completions", "/api/v1/messages", "/api/v1/responses"]
params: ["include_reasoning", "logprobs", "max_tokens", "reasoning", "reasoning_effort", "response_format", "seed", "stop", "structured_outputs", "temperature", "tool_choice", "tools", "top_logprobs", "top_p"]
endpoints: 9
gateways: "openrouter (4), vercel (4), requesty (1)"
no_training: 9
trains: 0
retains_prompts: 2
coding: 42.2000
agentic: 15.5000
---
# SpaceXAI: Grok 4.3

Grok 4.3 is a reasoning model from xAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual accuracy. Reasoning is always active and cannot be disabled or configured by effort level. It supports a 1 million token context window with no output token limit, making it well-suited for long-document analysis, deep research, and multi-step agentic tasks. Pricing is tiered: requests exceeding 200k total tokens are billed at a higher rate.