Claude Opus 4 vs Grok Code Fast 1
Compare Anthropic and xAI AI models
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Claude Opus 4
Grok Code Fast 1
Cost Differences
Grok Code Fast 1 costs less than Claude Opus 4
Feature Comparison
| Feature | Claude Opus 4 | Grok Code Fast 1 |
|---|---|---|
| Provider | Anthropic | xAI |
| Input Price | $15.00/1M tokens | $0.20/1M tokens |
| Output Price | $75.00/1M tokens | $1.50/1M tokens |
| Context Window | 200,000 tokens | 256,000 tokens |
| Max Output | 32,000 tokens | 32,768 tokens |
| Category | flagship | standard |
| Capabilities | textvisioncodereasoning | textcodereasoning |
| Release Date | 5/14/2025 | 2/1/2026 |
Claude Opus 4 vs Grok Code Fast 1: Which Should You Choose?
Choosing between Claude Opus 4 and Grok Code Fast 1 depends on your priorities: cost efficiency, context length, or raw capability. Grok Code Fast 1 is the more affordable option at $0.20/1M input tokens — 99% cheaper than Claude Opus 4. Meanwhile, Grok Code Fast 1 offers a significantly larger context window at 256,000 tokens vs 200,000 for Claude Opus 4.
These models come from different providers — Anthropic and xAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Anthropic, switching to xAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Claude Opus 4 is a flagship model while Grok Code Fast 1 is standard. This means they're optimized for different workloads. Claude Opus 4 is built for complex tasks that require deeper reasoning, while Grok Code Fast 1 offers better value for routine operations.
Output costs matter too. Claude Opus 4 charges $75.00/1M output tokens vs $1.50 for Grok Code Fast 1. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Grok Code Fast 1 has the edge here at $1.50/1M output tokens.
Multimodal capabilities: Claude Opus 4 supports vision (image inputs) while Grok Code Fast 1 is text-only. If your application needs image understanding, this narrows your choice.
Best Use Cases
Choose Claude Opus 4 when:
- • You need more capabilities (vision)
- • You're already using Anthropic's API ecosystem
Choose Grok Code Fast 1 when:
- • Budget is a primary concern
- • You need a larger context window (256,000 tokens)
- • You need longer outputs (up to 32,768 tokens)
- • You're already using xAI's API ecosystem
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Claude Opus 4 (Anthropic)
Grok Code Fast 1 (xAI)
Start using Claude Opus 4 today
Sign Up for Anthropic →Start using Grok Code Fast 1 today
Sign Up for xAI →