Claude 4 Opus vs GPT-5.5 Pro
Deprecated Anthropic premium vs OpenAI's most powerful model — 5x more context at 2x the price. The ultra-premium comparison for demanding workloads.
Pricing data verified: Jun 11, 2026
| Specification | Claude 4 Opus | GPT-5.5 Pro |
|---|---|---|
| Input Price (per 1M tokens) | $15.00 | $30.00 |
| Output Price (per 1M tokens) | $75.00 | $180.00 |
| Context Window | 200K tokens | 1.05M tokens |
| Tier | Premium | Ultra-Premium |
| Provider | Anthropic | OpenAI |
| License | Proprietary | Proprietary |
| Self-Hostable | No | No |
| Status | Deprecated Jun 15 | Active |
| Cost at 1M input + 500K output | $52.50 | $120.00 |
Calculate Your Exact Costs
Enter your usage to compare costs between Claude 4 Opus and GPT-5.5 Pro.
Which Model for Which Use Case?
Massive Context Workloads
GPT-5.5 Pro's 1.05M context window is 5.25x larger than Claude 4 Opus's 200K. Ideal for analyzing entire codebases, long documents, or multi-turn conversations that need to retain extensive history.
Cost-Conscious Premium
Claude 4 Opus is 50% cheaper than GPT-5.5 Pro on both input and output. For workloads that don't need 1M+ context, Claude 4 Opus delivers premium quality at a lower price point — until June 15.
After June 15 Migration
When Claude 4 Opus deprecates, GPT-5.5 Pro ($30/$180) is the ultra-premium upgrade with 5x more context. For a cheaper path, Claude Opus 4.8 ($5/$25) is 67% cheaper with 1M context.
Maximum Savings
For the deepest savings, skip both premium models. GPT-5 ($1.25/$10) is 92% cheaper than Claude 4 Opus. Llama 4 Maverick ($0.27/$0.85) is 98% cheaper with 1M context.
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Frequently Asked Questions
Is GPT-5.5 Pro more expensive than Claude 4 Opus?
Yes, GPT-5.5 Pro is 2x more expensive on both input and output. Claude 4 Opus costs $15.00/M input and $75.00/M output. GPT-5.5 Pro costs $30.00/M input and $180.00/M output. However, GPT-5.5 Pro offers 5.25x more context (1.05M vs 200K tokens). For a typical workload of 1M input + 500K output tokens/month, GPT-5.5 Pro costs $120.00 vs Claude 4 Opus's $52.50.
Why would I choose GPT-5.5 Pro over Claude 4 Opus?
GPT-5.5 Pro's key advantage is its 1.05M token context window — 5.25x larger than Claude 4 Opus's 200K. This makes it ideal for analyzing massive codebases, entire books, or long multi-turn conversations without losing context. GPT-5.5 Pro also represents OpenAI's most capable model for complex reasoning, code generation, and multimodal tasks. If you need the absolute best quality and can absorb the higher cost, GPT-5.5 Pro is the premium choice.
What happens when Claude 4 Opus deprecates on June 15?
After June 15, 2026, Claude 4 Opus API calls will fail with errors. Migration options: (1) GPT-5.5 Pro ($30/$180) — most powerful model, 1.05M context, 2x price. (2) Claude Opus 4.8 ($5/$25) — direct Anthropic successor, 67% cheaper, 1M context. (3) GPT-5 ($1.25/$10) — 92% cheaper, 272K context. (4) Llama 4 Maverick ($0.27/$0.85) — 98% cheaper, open source, 1M context.
What is the cheapest alternative to Claude 4 Opus with 1M+ context?
For 1M+ context at the lowest cost, Llama 4 Maverick ($0.27/$0.85) is 98% cheaper than Claude 4 Opus with 1M context. DeepSeek V4 Pro ($0.44/$0.87) is 97% cheaper with 1M context. Claude Opus 4.8 ($5/$25) is 67% cheaper with 1M context and is the direct Anthropic successor. GPT-5.5 Pro ($30/$180) has 1.05M context but is 2x more expensive.