Claude Opus 4.8 vs o1
Pricing, benchmarks, and use case comparison
Quick take
- •Claude Opus 4.8 leads on 1 of 1 shared benchmarks, including GPQA Diamond (93.6% vs 77.3%).
- •Claude Opus 4.8 is meaningfully stronger at speed (68 vs 30 on our capability index).
- •Claude Opus 4.8 is 67% cheaper on input tokens, which compounds fast on high-volume or agentic workloads.
- •Claude Opus 4.8 has a 1M context window vs 200,000 tokens (100,000 max output) - better for whole-repo or long-document work.
Specs comparison
| Claude Opus 4.8 | o1 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Type | Closed source | Closed source |
| Context window | ✓1M | 200,000 tokens (100,000 max output) |
| Input / 1M tokens | ✓$5.00 | $15.00 |
| Output / 1M tokens | $25.00 | $60.00 |
| Release date | 2026-05 | 2024-12 |
Benchmarks
| Benchmark | Claude Opus 4.8 | o1 |
|---|---|---|
| SWE-bench Verified | 88.6% | - |
| SWE-bench Pro | 69.2% | - |
| Terminal-Bench 2.1 | 74.6% | - |
| GPQA Diamond | ✓93.6% | 77.3% |
| Artificial Analysis Intelligence Index | 61.4 | - |
| AIME 2024 | - | 74% |
| Codeforces | - | ~89th percentile |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose Claude Opus 4.8 if...
- →You need top-tier autonomous coding and multi-step agentic reliability
- →You run long-horizon agent traces that previously derailed after compaction
- →You want enterprise-grade reasoning with 1M context and 128k output
- →You need throughput and are willing to pay fast-mode premium for 2.5x speed
Choose o1 if...
- →Hard, multi-step math, science, and logic problems that reward deliberate reasoning
- →Competitive programming and algorithmic problem solving
- →Existing o1-based pipelines already validated for reasoning tasks