Premium Showdown
GPT-5.5 Pro vs Claude Opus 4.8
GPT-5.5 Pro at $30.00/$180.00 vs Claude Opus 4.8 at $5.00/$25.00.
Last verified: Jul 13, 2026 · See all 88 models ranked →
| Feature | GPT-5.5 Pro | Claude Opus 4.8 |
|---|---|---|
| Input price (per 1M tokens) | $30.00 | $5.00 |
| Output price (per 1M tokens) | $180.00 | $25.00 |
| Context window | 1.05M | 1M |
| Standard request cost | $0.12 | $0.018 |
| Output-heavy request cost | $0.77 | $0.11 |
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Openai
GPT-5.5 Pro
$0
estimated monthly cost
Input cost$0
Output cost$0
Per request$0
Anthropic
Claude Opus 4.8
$0
estimated monthly cost
Input cost$0
Output cost$0
Per request$0
The Verdict
Claude Opus 4.8 wins on price and context.
Claude Opus 4.8 ($5.00/$25.00) is 86% cheaper on output than GPT-5.5 Pro ($30.00/$180.00).
When to Choose GPT-5.5 Pro
- Choose GPT-5.5 Pro when you need the larger context window (1.05M vs 1M) or prefer the openai ecosystem.
- Ecosystem: If you're already using openais API and want to stay in their ecosystem.
When to Choose Claude Opus 4.8
- Choose Claude Opus 4.8 when you want the lower output price ($25.00/1M vs $180.00/1M).
- Ecosystem: If you're already using anthropics API and want to stay in their ecosystem.
Cost Comparison: Real-World Scenarios
Chatbot (1,000 req/day, 1,500 input, 400 output)
GPT-5.5 Pro$3510.00/mo
Claude Opus 4.8$525.00/mo
Monthly savings$2985.00/mo (85%)
Code Generation (200 req/day, 3,000 input, 1,200 output)
GPT-5.5 Pro$1836.00/mo
Claude Opus 4.8$270.00/mo
Monthly savings$1566.00/mo (85%)
RAG Pipeline (500 queries/day, 5,000 input, 800 output)
GPT-5.5 Pro$4410.00/mo
Claude Opus 4.8$675.00/mo
Monthly savings$3735.00/mo (85%)
Full Comparison Table
| Model | Input/1M | Output/1M | vs GPT-5.5 Pro | Context |
|---|---|---|---|---|
| GPT-5.5 Pro | $30.00 | $180.00 | — | 1.05M |
| Claude Opus 4.8 | $5.00 | $25.00 | 86% cheaper | 1M |
| DeepSeek V4 Flash | $0.14 | $0.28 | 100% cheaper | 1M |
| GPT-oss 20B | $0.080 | $0.35 | 100% cheaper | 128K |
| Gemini 2.5 Flash-Lite | $0.10 | $0.40 | 100% cheaper | 1M |
| Jamba Mini | $0.20 | $0.40 | 100% cheaper | 256K |
| Llama 4 Scout | $0.18 | $0.59 | 100% cheaper | 1M |
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