Claude Opus 4.6 vs Grok 4-20
Complete pricing and performance comparison between Anthropic's Claude Opus 4.6 and xAI's Grok 4-20.
Quick Verdict
Cheaper
Grok 4-20
2.5x cheaper input, 4.2x cheaper output
Larger Context
Claude Opus 4.6
200K vs 131K
Higher Quality
Grok 4-20
Score: 49 vs 47
Faster
Grok 4-20
101 vs 44 tok/s
Pricing Comparison
| Spec | Claude Opus 4.6 | Grok 4-20 | Difference |
|---|---|---|---|
| Provider | Anthropic | xAI | |
| Input / 1M tokens | $5 | $2 | Grok 4-20 is 60% more expensive |
| Output / 1M tokens | $25 | $6 | Grok 4-20 is 76% more expensive |
| Context Window | 200K | 131K | 2x difference |
| Max Output | 32K | 16K |
Performance Benchmarks
| Metric | Claude Opus 4.6 | Grok 4-20 | Winner |
|---|---|---|---|
| Quality Index | 47 | 49 | Grok 4-20 |
| Output Speed | 44 tok/s | 101 tok/s | Grok 4-20 |
| Time to First Token | 1.90s | 20.69s | Claude Opus 4.6 |
| Value (Quality/$) | 9.3 | 24.3 | Higher = better value |
Benchmark data from Artificial Analysis. Quality Index is a composite score across reasoning, coding, and knowledge tasks.
Cost at Scale
Estimated cost at different usage levels (3:1 input-to-output token ratio, typical for chat).
| Usage | Claude Opus 4.6 | Grok 4-20 | Savings |
|---|---|---|---|
Single request 1K in / 300 out | $0.013 | $0.0038 | Grok 4-20 saves $0.0087 |
10 requests 10K in / 3K out | $0.125 | $0.038 | Grok 4-20 saves $0.087 |
100 requests 100K in / 30K out | $1.25 | $0.380 | Grok 4-20 saves $0.870 |
1,000 requests 1M in / 300K out | $12.50 | $3.80 | Grok 4-20 saves $8.70 |
10,000 requests 10M in / 3M out | $125.00 | $38.00 | Grok 4-20 saves $87.00 |
1M requests/mo 1B in / 300M out | $12500.00 | $3800.00 | Grok 4-20 saves $8700.00 |
Pros & Cons
Claude Opus 4.6 Strengths
- +Larger context window (200K vs 131K)
- +Higher max output tokens
- +Lower latency (faster first token)
Grok 4-20 Strengths
- +Cheaper input tokens
- +Cheaper output tokens
- +Faster output (101 vs 44 tok/s)
- +Higher quality score (49 vs 47)
When to Use Each Model
Choose Claude Opus 4.6 for
- →Long documents, large codebases, or multi-turn conversations
- →Generating long-form content or detailed code
Choose Grok 4-20 for
- →Budget-conscious projects where cost is the primary factor
- →Tasks requiring maximum accuracy and reasoning
- →Real-time applications, chat, or autocomplete
Frequently Asked Questions
Which is cheaper, Claude Opus 4.6 or Grok 4-20?
For input tokens, Grok 4-20 is 2.5x cheaper at $2/1M tokens. For output tokens, Grok 4-20 is 4.2x cheaper at $6/1M tokens. At typical usage (1M input + 300K output), Claude Opus 4.6 costs $12.50 vs Grok 4-20 at $3.80.
What's the context window difference?
Claude Opus 4.6 supports 200K context (200,000 tokens), while Grok 4-20 supports 131K (131,072 tokens). Claude Opus 4.6 can handle 2x more context in a single request.
Which model has better benchmarks?
Quality Index: Claude Opus 4.6 scores 47 vs Grok 4-20 at 49. Speed: Claude Opus 4.6 generates 44 tok/s vs Grok 4-20 at 101 tok/s. Time to first token: Claude Opus 4.6 at 1.90s vs Grok 4-20 at 20.69s.
When should I choose Claude Opus 4.6 over Grok 4-20?
Choose Claude Opus 4.6 when you need: Larger context window (200K vs 131K), Higher max output tokens, Lower latency (faster first token). Choose Grok 4-20 when you need: Cheaper input tokens, Cheaper output tokens, Faster output (101 vs 44 tok/s), Higher quality score (49 vs 47).
How much would 10,000 API requests cost?
At 1K input + 300 output tokens per request (typical chat): Claude Opus 4.6 = $125.00, Grok 4-20 = $38.00. At 10K input + 1K output per request (longer conversations): Claude Opus 4.6 = $750.00, Grok 4-20 = $260.00.