Claude Opus 4.8 vs GPT-5
Cost and capability comparison. For a sample workload of 1,000 input and 500 output tokens across 100,000 requests/month, GPT-5 is cheaper by about $1,125.00/month.
| Claude Opus 4.8 | GPT-5 | |
|---|---|---|
| Intelligence | ||
| Arena · Overall(LMArena Elo — higher is better) | 1452✓ | 1406 |
| Arena rank (overall) | #25✓ | #70 |
| Arena · Coding | 1539✓ | 1395 |
| Arena · Math & reasoning | 1435✓ | 1420 |
| Arena · Agentic / tool use | 1445✓ | 1415 |
| Score evidence | Measured | Measured |
| Pricing (USD / 1M tokens) | ||
| Input | $5.00 | $1.25✓ |
| Output | $25.00 | $10.00✓ |
| Cached input (read) | $0.5000 | $0.1250✓ |
| Cache write | $6.25✓ | — |
| Blended(3:1 input:output blend) | $10.00 | $3.44✓ |
| Specs & capabilities | ||
| Provider | Anthropic | OpenAI |
| Context window | 1M (1,000,000)✓ | 128K (128,000) |
| Max output | 64,000 | 128,000✓ |
| Modalities | text, image | text, image |
| Vision | Yes | Yes |
| Tool use | Yes | Yes |
| Reasoning | Yes | Yes |
| Prompt caching | Yes | Yes |
| Batch pricing | Yes | Yes |
| Tokenizer | claude | o200k_base |
| Release date | 2026-05-28 | — |
| Status | ga | ga |
Intelligence scores are community Arena ratings from LMArena / arena.ai, used under CC BY 4.0. Snapshot last refreshed 27 August 2026. Scores are a relative signal, not an absolute measure of capability. A Measured score was voted on directly; an Estimated score is inherited from an identical base model (a regional/creator-prefixed hosting duplicate). See our methodology.
Compare on your own workload
Claude Opus 4.8 and GPT-5 are pre-loaded. Adjust the tokens and monthly volume to see which is cheaper for your usage.
Used unless you set active users below.
Results update automatically as you type.
| GPT-5 | OpenAI | $0.00625 | $625.00 | $7,500.00 | 128,000 |
| Claude Opus 4.8 | Anthropic | $0.0175 | $1,750.00 | $21,000.00 | 1,000,000 |
FAQ
Which is cheaper, Claude Opus 4.8 or GPT-5?
For a workload of 1,000 input and 500 output tokens over 100,000 requests/month, GPT-5 is cheaper, costing about $625.00/month versus $1,750.00/month.
What is the context window of Claude Opus 4.8 and GPT-5?
Claude Opus 4.8 supports 1,000,000 tokens, while GPT-5 supports 128,000 tokens.
Estimates for planning only. Verify current pricing with each provider.