Compare / head-to-head
Claude Opus 5vs
Step 5 Preview
Claude Opus 5 leads 5 of 5 shared benchmarks. Step 5 Preview is 8.1x cheaper per token. Both offer a 1M-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
5 – 0
Claude Opus 5 leads
Cheaper per token
Step 5 Preview
8.1x cheaper, input + output
Larger context
Tie
both 1M tokens
Providers
2 providers
Anthropic · StepFun
Claude Opus 5
Anthropic · released 2026-07-24
textvision
Step 5 Preview
StepFun · released 2026-09-20
textvisionvideo
Quality
Benchmark matrix
5 shared · 31 only Claude Opus 5 · 0 only Step 5 Preview| Benchmark | Claude Opus 5 | Step 5 Preview | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 5 | ||||
| LMArena Elo | 1489.7 ↗ | 1453.7 ↗ | +36 | Claude Opus 5 |
| LMArena Agent (LMArena) | 0.0867 ↗ | 0.0048 ↗ | +0.1 | Claude Opus 5 |
| LMArena Vision (LMArena) | 1289 ↗ | 1259.7 ↗ | +29.3 | Claude Opus 5 |
| LMArena WebDev (LMArena) | 1695 ↗ | 1570.2 ↗ | +124.8 | Claude Opus 5 |
| Terminal-Bench 4.0 (Vals AI) | 53.5% ↗ | 31.8% ↗ | +21.7 pt | Claude Opus 5 |
| Only Claude Opus 5 reports · 31 | ||||
| GPQA Diamond | 93.9% ↗epoch run | not reported | — | — |
| Humanity's Last Exam (no tools) | 56.6% ↗ | not reported | — | — |
| APEX-Agents (Mercor) | 65.8% ↗ | not reported | — | — |
| BALROG (BALROG) | 63.4% ↗ | not reported | — | — |
| Chess Puzzles (Epoch AI run) | 42% ↗epoch run | not reported | — | — |
| CursorBench 3.2.0 | 70% ↗ | not reported | — | — |
| DeepSWE v1.1 (Datacurve) | 73.6% ↗ | not reported | — | — |
| EBR-bench (Epoch AI run) | 45.7% ↗epoch run | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 73.2% ↗epoch run | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 85.6% ↗epoch run | not reported | — | — |
| FrontierSWE V2 (Proximal Labs) | 52% ↗ | not reported | — | — |
| Furniture Assembly (Epoch AI run) | 60.8% ↗epoch run | not reported | — | — |
| GDPval-AA v2 | 1824 ↗ | not reported | — | — |
| LiveBench Agentic Coding (LiveBench) | 65.2% ↗ | not reported | — | — |
| LiveBench Coding (LiveBench) | 81.4% ↗ | not reported | — | — |
| LiveBench Data Analysis (LiveBench) | 74.6% ↗ | not reported | — | — |
| LiveBench Instruction Following (LiveBench) | 63.8% ↗ | not reported | — | — |
| LiveBench Language (LiveBench) | 88.7% ↗ | not reported | — | — |
| LiveBench Mathematics (LiveBench) | 95.7% ↗ | not reported | — | — |
| LiveBench Reasoning (LiveBench) | 91.2% ↗ | not reported | — | — |
| Mystery Game Puzzles (Epoch AI run) | 59% ↗epoch run | not reported | — | — |
| OSWorld-Verified (XLANG) | 83.4% ↗ | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 98.9% ↗epoch run | not reported | — | — |
| SAGE (Vals AI) | 49.4% ↗ | not reported | — | — |
| SimpleBench (SimpleBench) | 80.6% ↗ | not reported | — | — |
| SimpleQA Verified | 59.9% ↗epoch run | not reported | — | — |
| SWE-rebench 2026-05-15 to 2026-07-01 (Nebius) | 63.4% ↗ | not reported | — | — |
| tau2-bench Banking Knowledge (Sierra) | 48.7% ↗ | not reported | — | — |
| Terminal-Bench Science 0.1 | 29% ↗ | not reported | — | — |
| Vending-Bench 2 (Andon Labs) | 11181.87 ↗ | not reported | — | — |
| WeirdML (Håvard Tveit Ihle) | 91.8% ↗ | not reported | — | — |
| Only Step 5 Preview reports · 0 | ||||
| Step 5 Preview reports nothing Claude Opus 5 does not. | ||||
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Claude Opus 5 minus Step 5 Preview in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Claude Opus 5 | Step 5 Preview | Edge |
|---|---|---|---|
| Context window | 1M tokens | 1M tokens | Tie |
| Max output | 128K tokens | 64K tokens | Claude Opus 5 |
| Input price / 1M | $5 ↗ | $1 ↗ | Step 5 Preview |
| Output price / 1M | $25 ↗ | $2.7 ↗ | Step 5 Preview |
| Cached input / 1M | $0.5 ↗ | $0.05 ↗ | Step 5 Preview |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $30 | $3.7 | Step 5 Preview |
| Modalities | text · vision | text · vision · video | Step 5 Preview |
| Released | 2026-07-24 | 2026-09-20 | — |
| Cited benchmark scores | 41 | 5 | — |
Reliability
Provider status
Live from /statusMore matchups
Claude Opus 5 vs …
Models sharing the most benchmarksMore matchups
Step 5 Preview vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
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