xAI’s Grok models have become one of the most compelling options for developers in 2026. With 2 million token context windows, aggressive pricing, and generous free credits, Grok deserves serious consideration for your next AI project.
💡 Want to calculate your exact costs? Use our AI API Pricing Calculator to compare Grok against Gemini, OpenAI, and Claude for your specific workload.
Quick Comparison: Which Grok Model Should You Use?
| Feature | Grok 4.20 | Grok 4.3 | Grok 4.1 Fast |
|---|---|---|---|
| Best For | Multi-agent, complex tasks | Production sweet spot | Budget & high-volume |
| Input Cost | $1.25/1M | $1.25/1M | $0.20/1M |
| Output Cost | $2.50/1M | $2.50/1M | $0.50/1M |
| Context Window | 2,000,000 | 1,000,000 | 2,000,000 |
| Cached Input | ~$0.20/1M | ~$0.13/1M | ~$0.02/1M |
Detailed API Pricing (Per 1 Million Tokens)
Grok 4.20 — The Flagship
| Cost Type | Price per 1M Tokens |
|---|---|
| Input | $1.25 |
| Output | $2.50 |
| Cached Input | ~$0.20 |
Context window: 2,000,000 tokens — the largest in the industry. Process entire codebases, books, or months of conversation in a single request.
Grok 4.3 — The Sweet Spot
| Cost Type | Price per 1M Tokens |
|---|---|
| Input | $1.25 |
| Output | $2.50 |
| Cached Input | ~$0.13 |
Context window: 1,000,000 tokens. The current flagship model as of May 15, 2026 — nearly all legacy models now redirect to Grok 4.3.
Grok 4.1 Fast — The Budget Rocket
| Cost Type | Price per 1M Tokens |
|---|---|
| Input | $0.20 |
| Output | $0.50 |
| Cached Input | ~$0.02 |
Context window: 2,000,000 tokens. At $0.20/M input, this is one of the cheapest reasoning-capable models from any provider.
Search & Tools Pricing
Live Search
| Sources Used | Cost per Request |
|---|---|
| 1 source (Web only) | $0.025 |
| 4 sources (Web + X + News + RSS) | $0.10 |
Billing: $25.00 per 1,000 sources requested.
Documents Search & Image Generation
| Feature | Cost |
|---|---|
| Document Search | $2.50 / 1K requests |
| File & Collection Storage | Free |
| Image Generation | $0.07 per image |
| Video Generation | $4.20 per minute |
Free API Credits
xAI offers up to $175/month in free promotional credits through data-sharing programs — perfect for startups testing the platform. Check your xAI developer console under Settings > Data Sharing to enroll.
Real-World Cost Examples
Scenario 1: Chatbot — 10,000 conversations/day (500 tokens in, 200 tokens out)
| Model | Daily Cost | Monthly Cost |
|---|---|---|
| Grok 4.20 | $11.25 | $338 |
| Grok 4.3 | $11.25 | $338 |
| Grok 4.1 Fast | $2.00 | $60 |
Scenario 2: Document Processing — 1,000 long documents/day (50K tokens in, 2K tokens out)
| Model | Daily Cost | Monthly Cost |
|---|---|---|
| Grok 4.20 | $67.50 | $2,025 |
| Grok 4.3 | $67.50 | $2,025 |
| Grok 4.1 Fast | $11.00 | $330 |
Scenario 3: Code Generation — 500 requests/day (1K tokens in, 3K tokens out)
| Model | Daily Cost | Monthly Cost |
|---|---|---|
| Grok 4.20 | $4.38 | $131 |
| Grok 4.3 | $4.38 | $131 |
| Grok 4.1 Fast | $0.85 | $26 |
How Grok Compares to Other Providers
| Model | Input/1M | Output/1M | Context | Provider |
|---|---|---|---|---|
| Grok 4.1 Fast | $0.20 | $0.50 | 2M | xAI |
| GPT-4.1 Nano | $0.10 | $0.40 | 1M | OpenAI |
| Gemini 3.5 Flash-Lite | $0.10 | $0.40 | 1M | |
| Claude Haiku 4.5 | $1.00 | $5.00 | 200K | Anthropic |
| Grok 4.3 | $1.25 | $2.50 | 1M | xAI |
| GPT-4.1 | $2.00 | $8.00 | 1M | OpenAI |
| Gemini 3 Flash | $0.50 | $3.00 | 1M | |
| Claude Sonnet 4.6 | $3.00 | $15.00 | 1M | Anthropic |
📊 Compare all models side-by-side: Try our interactive pricing calculator to see exact costs for your workload.
Key Takeaways
- Grok 4.1 Fast at $0.20/M input is among the cheapest reasoning models available — with the industry’s largest context window
- 2M token context windows on two models are unmatched by any competitor
- Grok 4.3 is now the default model — all legacy redirects point here
- Free credits ($175/mo) make Grok exceptionally startup-friendly
- Live Search integration makes Grok ideal for real-time information tasks
- Batch API can save an additional 50% for non-urgent workloads
Related Pricing Guides
- 📘 Google Gemini API Pricing May 2026 — Complete Gemini 3.1 Pro, Flash & Flash-Lite breakdown
- 📗 OpenAI API Pricing May 2026 — GPT-5.5, GPT-4.1, and o3 cost guide
- 📊 AI Model Comparison 2026 — Side-by-side comparison of all providers
- 🧮 AI API Pricing Calculator — Interactive cost estimator for all providers
Prices current as of May 2026. Check xAI documentation for the latest rates.
Download the 2026 AI API Cost Optimization Spreadsheet
A complete, ready-to-use template to model, calculate, and project your API bills for Gemini, OpenAI, Grok, and Claude.
