xAI offers 58 models through Lava’s AI Gateway, supporting Chat Completions, Chat Completions (Native). Authentication uses Authorization: Bearer. See the xAI API docs for provider-specific parameters.
Supports both managed (Lava’s API keys) and unmanaged (bring your own credentials) mode.
Quick Start const response = await fetch ( 'https://api.lava.so/v1/forward?u=https%3A%2F%2Fapi.x.ai%2Fv1%2Fchat%2Fcompletions' , { method: 'POST' , headers: { 'Content-Type' : 'application/json' , Authorization: `Bearer ${ forwardToken } ` , }, body: JSON . stringify ({ model: 'grok-4.20-0309-reasoning' , messages: [{ role: "user" , content: "Hello!" }], }), });
Chat Completions Target URL: https://api.x.ai/v1/chat/completionsContent Type application/jsonStreaming Yes (set stream: true in request body)
Model Input / 1M tokens Output / 1M tokens grok-3-fast-beta $5.00 $25.00 grok-3-fast $5.00 $25.00 grok-3-fast-latest $5.00 $25.00 grok-4-0709 $3.00 $15.00 grok-4-latest $3.00 $15.00 grok-4 $3.00 $15.00 grok-3-beta $3.00 $15.00 grok-3 $3.00 $15.00 grok-3-latest $3.00 $15.00 grok-4.20-0309-reasoning $2.00 $6.00 grok-4.20-0309-non-reasoning $2.00 $6.00 grok-4.20-multi-agent-0309 $2.00 $6.00 grok-3-mini-fast-beta $0.60 $4.00 grok-3-mini-fast $0.60 $4.00 grok-3-mini-fast-latest $0.60 $4.00 grok-3-mini-beta $0.30 $0.50 grok-3-mini $0.30 $0.50 grok-3-mini-latest $0.30 $0.50 grok-4-1-fast-reasoning $0.20 $0.50 grok-4-1-fast-reasoning-latest $0.20 $0.50 grok-4-1-fast-non-reasoning $0.20 $0.50 grok-4-1-fast-non-reasoning-latest $0.20 $0.50 grok-code-fast-1 $0.20 $1.50 grok-code-fast $0.20 $1.50 grok-code-fast-1-0825 $0.20 $1.50 grok-4-fast-non-reasoning $0.20 $0.50 grok-4-fast-non-reasoning-latest $0.20 $0.50 grok-4-fast-reasoning $0.20 $0.50 grok-4-fast-reasoning-latest $0.20 $0.50
Chat Completions (Native) Target URL: https://api.x.ai/v1/messagesContent Type application/jsonStreaming Yes (set stream: true in request body)
Model Input / 1M tokens Output / 1M tokens grok-3-fast-beta $5.00 $25.00 grok-3-fast $5.00 $25.00 grok-3-fast-latest $5.00 $25.00 grok-4-0709 $3.00 $15.00 grok-4-latest $3.00 $15.00 grok-4 $3.00 $15.00 grok-3-beta $3.00 $15.00 grok-3 $3.00 $15.00 grok-3-latest $3.00 $15.00 grok-4.20-0309-reasoning $2.00 $6.00 grok-4.20-0309-non-reasoning $2.00 $6.00 grok-4.20-multi-agent-0309 $2.00 $6.00 grok-3-mini-fast-beta $0.60 $4.00 grok-3-mini-fast $0.60 $4.00 grok-3-mini-fast-latest $0.60 $4.00 grok-3-mini-beta $0.30 $0.50 grok-3-mini $0.30 $0.50 grok-3-mini-latest $0.30 $0.50 grok-4-1-fast-reasoning $0.20 $0.50 grok-4-1-fast-reasoning-latest $0.20 $0.50 grok-4-1-fast-non-reasoning $0.20 $0.50 grok-4-1-fast-non-reasoning-latest $0.20 $0.50 grok-code-fast-1 $0.20 $1.50 grok-code-fast $0.20 $1.50 grok-code-fast-1-0825 $0.20 $1.50 grok-4-fast-non-reasoning $0.20 $0.50 grok-4-fast-non-reasoning-latest $0.20 $0.50 grok-4-fast-reasoning $0.20 $0.50 grok-4-fast-reasoning-latest $0.20 $0.50
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