Claude Sonnet 4.6 vs Gemini 2.5 Pro
Complete pricing and performance comparison between Anthropic's Claude Sonnet 4.6 and Google's Gemini 2.5 Pro.
Quick Verdict
Cheaper
Gemini 2.5 Pro
2.4x cheaper input, 1.5x cheaper output
Larger Context
Gemini 2.5 Pro
1.0M vs 200K
Higher Quality
Claude Sonnet 4.6
Score: 44 vs 35
Faster
Gemini 2.5 Pro
128 vs 54 tok/s
Pricing Comparison
| Spec | Claude Sonnet 4.6 | Gemini 2.5 Pro | Difference |
|---|---|---|---|
| Provider | Anthropic | ||
| Input / 1M tokens | $3 | $1.25 | Gemini 2.5 Pro is 58% more expensive |
| Output / 1M tokens | $15 | $10 | Gemini 2.5 Pro is 33% more expensive |
| Context Window | 200K | 1.0M | 5x difference |
| Max Output | 64K | 66K |
Performance Benchmarks
| Metric | Claude Sonnet 4.6 | Gemini 2.5 Pro | Winner |
|---|---|---|---|
| Quality Index | 44 | 35 | Claude Sonnet 4.6 |
| Output Speed | 54 tok/s | 128 tok/s | Gemini 2.5 Pro |
| Time to First Token | 1.17s | 22.13s | Claude Sonnet 4.6 |
| Value (Quality/$) | 14.8 | 27.7 | 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 Sonnet 4.6 | Gemini 2.5 Pro | Savings |
|---|---|---|---|
Single request 1K in / 300 out | $0.0075 | $0.0042 | Gemini 2.5 Pro saves $0.0033 |
10 requests 10K in / 3K out | $0.075 | $0.042 | Gemini 2.5 Pro saves $0.033 |
100 requests 100K in / 30K out | $0.750 | $0.425 | Gemini 2.5 Pro saves $0.325 |
1,000 requests 1M in / 300K out | $7.50 | $4.25 | Gemini 2.5 Pro saves $3.25 |
10,000 requests 10M in / 3M out | $75.00 | $42.50 | Gemini 2.5 Pro saves $32.50 |
1M requests/mo 1B in / 300M out | $7500.00 | $4250.00 | Gemini 2.5 Pro saves $3250.00 |
Pros & Cons
Claude Sonnet 4.6 Strengths
- +Higher quality score (44 vs 35)
- +Lower latency (faster first token)
Gemini 2.5 Pro Strengths
- +Cheaper input tokens
- +Cheaper output tokens
- +Larger context window (1.0M vs 200K)
- +Higher max output tokens
- +Faster output (128 vs 54 tok/s)
When to Use Each Model
Choose Claude Sonnet 4.6 for
- →Tasks requiring maximum accuracy and reasoning
Choose Gemini 2.5 Pro for
- →Budget-conscious projects where cost is the primary factor
- →Long documents, large codebases, or multi-turn conversations
- →Generating long-form content or detailed code
- →Real-time applications, chat, or autocomplete
Frequently Asked Questions
Which is cheaper, Claude Sonnet 4.6 or Gemini 2.5 Pro?
For input tokens, Gemini 2.5 Pro is 2.4x cheaper at $1.25/1M tokens. For output tokens, Gemini 2.5 Pro is 1.5x cheaper at $10/1M tokens. At typical usage (1M input + 300K output), Claude Sonnet 4.6 costs $7.50 vs Gemini 2.5 Pro at $4.25.
What's the context window difference?
Claude Sonnet 4.6 supports 200K context (200,000 tokens), while Gemini 2.5 Pro supports 1.0M (1,048,576 tokens). Gemini 2.5 Pro can handle 5x more context in a single request.
Which model has better benchmarks?
Quality Index: Claude Sonnet 4.6 scores 44 vs Gemini 2.5 Pro at 35. Speed: Claude Sonnet 4.6 generates 54 tok/s vs Gemini 2.5 Pro at 128 tok/s. Time to first token: Claude Sonnet 4.6 at 1.17s vs Gemini 2.5 Pro at 22.13s.
When should I choose Claude Sonnet 4.6 over Gemini 2.5 Pro?
Choose Claude Sonnet 4.6 when you need: Higher quality score (44 vs 35), Lower latency (faster first token). Choose Gemini 2.5 Pro when you need: Cheaper input tokens, Cheaper output tokens, Larger context window (1.0M vs 200K), Higher max output tokens, Faster output (128 vs 54 tok/s).
How much would 10,000 API requests cost?
At 1K input + 300 output tokens per request (typical chat): Claude Sonnet 4.6 = $75.00, Gemini 2.5 Pro = $42.50. At 10K input + 1K output per request (longer conversations): Claude Sonnet 4.6 = $450.00, Gemini 2.5 Pro = $225.00.
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