Skip to main content
TC
TokenCost

Claude Opus 4.6 vs Claude Sonnet 4.5

Complete pricing and performance comparison between Anthropic's Claude Opus 4.6 and Anthropic's Claude Sonnet 4.5.

Quick Verdict

Cheaper
Claude Sonnet 4.5
1.7x cheaper input, 1.7x cheaper output
Larger Context
Claude Opus 4.6
200K vs 200K

Pricing Comparison

SpecClaude Opus 4.6Claude Sonnet 4.5Difference
ProviderAnthropicAnthropic
Input / 1M tokens$5$3Claude Sonnet 4.5 is 40% more expensive
Output / 1M tokens$25$15Claude Sonnet 4.5 is 40% more expensive
Context Window200K200KSame
Max Output32K64K

Performance Benchmarks

MetricClaude Opus 4.6Claude Sonnet 4.5Winner
Quality Index47--N/A
Output Speed56 tok/s--N/A
Value (Quality/$)9.3--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).

UsageClaude Opus 4.6Claude Sonnet 4.5Savings
Single request
1K in / 300 out
$0.013$0.0075Claude Sonnet 4.5 saves $0.0050
10 requests
10K in / 3K out
$0.125$0.075Claude Sonnet 4.5 saves $0.050
100 requests
100K in / 30K out
$1.25$0.750Claude Sonnet 4.5 saves $0.500
1,000 requests
1M in / 300K out
$12.50$7.50Claude Sonnet 4.5 saves $5.00
10,000 requests
10M in / 3M out
$125.00$75.00Claude Sonnet 4.5 saves $50.00
1M requests/mo
1B in / 300M out
$12500.00$7500.00Claude Sonnet 4.5 saves $5000.00

Pros & Cons

Claude Opus 4.6 Strengths

Part of the Anthropic ecosystem

Claude Sonnet 4.5 Strengths

  • +Cheaper input tokens
  • +Cheaper output tokens
  • +Higher max output tokens

When to Use Each Model

Choose Claude Opus 4.6 for

  • Projects already integrated with Anthropic's ecosystem

Choose Claude Sonnet 4.5 for

  • Budget-conscious projects where cost is the primary factor
  • Generating long-form content or detailed code

Frequently Asked Questions

Which is cheaper, Claude Opus 4.6 or Claude Sonnet 4.5?
For input tokens, Claude Sonnet 4.5 is 1.7x cheaper at $3/1M tokens. For output tokens, Claude Sonnet 4.5 is 1.7x cheaper at $15/1M tokens. At typical usage (1M input + 300K output), Claude Opus 4.6 costs $12.50 vs Claude Sonnet 4.5 at $7.50.
What's the context window difference?
Claude Opus 4.6 supports 200K context (200,000 tokens), while Claude Sonnet 4.5 supports 200K (200,000 tokens). Claude Sonnet 4.5 can handle 1x more context in a single request.
Which model has better benchmarks?
When should I choose Claude Opus 4.6 over Claude Sonnet 4.5?
Choose Claude Opus 4.6 when you need: a Anthropic ecosystem model. Choose Claude Sonnet 4.5 when you need: Cheaper input tokens, Cheaper output tokens, Higher max output tokens.
How much would 10,000 API requests cost?
At 1K input + 300 output tokens per request (typical chat): Claude Opus 4.6 = $125.00, Claude Sonnet 4.5 = $75.00. At 10K input + 1K output per request (longer conversations): Claude Opus 4.6 = $750.00, Claude Sonnet 4.5 = $450.00.

Related Comparisons