Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Claude 4 Opus (Reasoning) | o1-preview |
|---|---|---|
| Input ($/M tokens) | $15 | $16.5 |
| Output ($/M tokens) | $75 | $66 |
Verdict. Claude 4 Opus (Reasoning) and o1-preview split the benchmark comparison evenly at 1–1. The tiebreaker here is price, speed, and what you actually run them on.
Pricing. Both models sit in the premium bracket for output-token pricing. At 1.1× the per-million-token cost, o1-preview is meaningfully cheaper if your traffic is output-heavy (long completions, document generation, agent loops). o1-preview makes more sense when output volume is low and absolute reasoning quality justifies the premium.
Strengths. Claude 4 Opus (Reasoning) is strongest on Intelligence Index (31.7). o1-preview leads on Coding Index (34.0), Intelligence Index (17.2).
Speed. Speed data is incomplete for this pair; benchmark and price should decide.
Provider. Anthropic and OpenAI sell to overlapping but distinct developer audiences: Anthropic tends to ship frontier reasoning models with premium positioning, while OpenAI often prices more aggressively. Your existing vendor relationships, billing, and SLA preferences may matter as much as the raw numbers above.
Workload cost. Workload scenarios (per million requests at 30M input + 15M output tokens): Claude 4 Opus (Reasoning) costs $1575.00 ($18900/year); o1-preview costs $1485.00 ($17820/year). At a smaller 5M-input/2M-output scale (single-developer tool or prototype): Claude 4 Opus (Reasoning) ≈ $225.00/run, o1-preview ≈ $214.50/run. At agent/realtime scale (200M input / 100M output per million requests): Claude 4 Opus (Reasoning) ≈ $10500/run, o1-preview ≈ $9900/run. o1-preview becomes more attractive at higher volume — the absolute per-token pricing difference compounds when you ship at scale.
Recommendation. Both models have legitimate use cases — the right answer depends on whether you are optimizing for benchmark ceiling, latency, or unit cost. Start with the cheaper / faster model, evaluate against your specific task, and only switch if the upgrade shows a meaningful lift.
Head-to-head deltas
Data from Artificial Analysis API — 12 benchmarks
o1-preview is cheaper overall. Its blended price (3:1 input/output ratio) is $28.88/M tokens vs $30.00/M for Claude 4 Opus (Reasoning).
It's a tie — both models win 1 benchmarks each across 12 evaluated categories. See the detailed benchmark chart above for per-category results.
Both models have comparable generation speeds.
Choose based on your priorities: o1-preview for lower cost, both perform similarly on benchmarks, and both have comparable speed. For latency-sensitive apps, check the TTFT comparison above.