Compare · ModelsLive · 2 picked · head to head
Claude Opus 4.6 (Fast) vs Claude Sonnet 4
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 4.6 (Fast) wins on 1/1 benchmarks
Claude Opus 4.6 (Fast) wins 1 of 1 shared benchmarks. Leads in safety.
Category leads
safety·Claude Opus 4.6 (Fast)
Hype vs Reality
Attention vs performance
Claude Opus 4.6 (Fast)
#120 by perf·no signal
Claude Sonnet 4
#115 by perf·no signal
Best value
Claude Sonnet 4
10.3x better value than Claude Opus 4.6 (Fast)
Claude Opus 4.6 (Fast)
0.5 pts/$
$90.00/M
Claude Sonnet 4
5.0 pts/$
$9.00/M
Vendor risk
Who is behind the model
Anthropic
$380.0B·Tier 1
Anthropic
$380.0B·Tier 1
Head to head
1 benchmark · 2 models
Claude Opus 4.6 (Fast)Claude Sonnet 4
MASK
Claude Opus 4.6 (Fast) leads by +1.0
Claude Opus 4.6 (Fast)
96.3
Claude Sonnet 4
95.3
Full benchmark table
| Benchmark | Claude Opus 4.6 (Fast) | Claude Sonnet 4 |
|---|---|---|
MASK | 96.3 | 95.3 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| Claude Opus 4.6 (Fast) | $30.00 | $150.00 | 1.0M tokens (~500 books) | $600.00 |
| Claude Sonnet 4 | $3.00 | $15.00 | 1.0M tokens (~500 books) | $60.00 |