Compare / head-to-head
Claude Opus 4.8vsClaude Opus 5
Claude Opus 5 leads 6 of 6 shared benchmarks. Both list the same combined token price. Both offer a 1M-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 6
Claude Opus 5 leads
Cheaper per token
Tie
list price, input + output
Larger context
Tie
both 1M tokens
Provider uptime (30d)
100%
Anthropic
Claude Opus 4.8
Anthropic · released 2026-05-28
textvision
Claude Opus 5
Anthropic · released 2026-07-24
textvision
Quality
Benchmark matrix
6 shared · 10 only Claude Opus 4.8 · 3 only Claude Opus 5| Benchmark | Claude Opus 4.8 | Claude Opus 5 | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 6 | ||||
| GPQA Diamond | 93.6% ↗ | 93.9% ↗epoch | -0.3 pt | Claude Opus 5 |
| Humanity's Last Exam (no tools) | 49.8% ↗ | 56.6% ↗ | -6.8 pt | Claude Opus 5 |
| FrontierMath Tier 4 v2 (Epoch AI run) | 56.1% ↗epoch | 73.2% ↗epoch | -17.1 pt | Claude Opus 5 |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 80% ↗epoch | 85.6% ↗epoch | -5.6 pt | Claude Opus 5 |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 98.3% ↗epoch | 98.9% ↗epoch | -0.6 pt | Claude Opus 5 |
| SimpleQA Verified | 53% ↗epoch | 59.9% ↗epoch | -6.9 pt | Claude Opus 5 |
| Only Claude Opus 4.8 reports · 10 | ||||
| SWE-bench Verified | 88.6% ↗ | not reported | — | — |
| AIME 2026 | 100% ↗matharena ⚠ | not reported | — | — |
| LMArena Elo | 1452.7 ↗ | not reported | — | — |
| BrowseComp | 84.3% ↗ | not reported | — | — |
| Humanity's Last Exam (with tools) | 57.9% ↗ | not reported | — | — |
| OSWorld-Verified | 83.4% ↗ | not reported | — | — |
| SWE-bench Multilingual | 84.4% ↗ | not reported | — | — |
| SWE-bench Multimodal | 38.4% ↗ | not reported | — | — |
| SWE-Bench Pro | 69.2% ↗ | not reported | — | — |
| Terminal-Bench 2.1 | 74.6% ↗ | not reported | — | — |
| Only Claude Opus 5 reports · 3 | ||||
| CursorBench 3.2.0 | not reported | 70% ↗ | — | — |
| GDPval-AA v2 | not reported | 1824 ↗ | — | — |
| Terminal-Bench Science 0.1 | not reported | 29% ↗ | — | — |
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 4.8 minus Claude Opus 5 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 4.8 | Claude Opus 5 | Edge |
|---|---|---|---|
| Context window | 1M tokens | 1M tokens | Tie |
| Max output | 128K tokens | 128K tokens | Tie |
| Input price / 1M | $5 ↗ | $5 ↗ | Tie |
| Output price / 1M | $25 ↗ | $25 ↗ | Tie |
| Cached input / 1M | $0.5 ↗ | $0.5 ↗ | Tie |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $30 | $30 | Tie |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-05-28 | 2026-07-24 | — |
| Cited benchmark scores | 17 | 9 | — |
Reliability
Anthropic status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude Opus 4.8 vs …
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Claude Opus 5 vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Claude Opus 4.8 and Claude Opus 5 on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.