GPT-5.5 Pro vs GPT-5 Pro
GPT-5.5 Pro vs GPT-5 Pro: GPT-5 Pro is cheaper for input-heavy usage ($15.00/M vs $30.00/M input tokens), while GPT-5.5 Pro is better for long-context tasks (1,050,000 tokens).
Direct answer: choose GPT-5 Pro for lower token spend and choose GPT-5.5 Pro when your workload needs longer context.
Common pricing searches covered on this page: GPT-5.5 Pro vs GPT-5 Pro • GPT-5.5 Pro vs GPT-5 Pro pricing • GPT-5.5 Pro vs GPT-5 Pro API pricing and 5 5 pro vs 5 pro pricing.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
GPT-5.5 Pro
GPT-5 Pro
Cost Differences
GPT-5 Pro costs less than GPT-5.5 Pro
Quick Recommendation
Winner for direct API pricing: GPT-5 Pro. At the default workload, GPT-5 Pro saves about $135.00/month ($1,642.50/year) versus GPT-5.5 Pro.
Feature Comparison
| Feature | GPT-5.5 Pro | GPT-5 Pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input Price | $30.00/1M tokens | $15.00/1M tokens |
| Output Price | $180.00/1M tokens | $120.00/1M tokens |
| Context Window | 1,050,000 tokens | 200,000 tokens |
| Max Output | 128,000 tokens | 100,000 tokens |
| Category | reasoning | flagship |
| Capabilities | textvisioncodereasoning | textvisioncodereasoning |
| Release Date | 4/24/2026 | 8/7/2025 |
GPT-5.5 Pro vs GPT-5 Pro: Which Should You Choose?
Choosing between GPT-5.5 Pro and GPT-5 Pro depends on your priorities: cost efficiency, context length, or raw capability. GPT-5 Pro is the more affordable option at $15.00/1M input tokens — 50% cheaper than GPT-5.5 Pro. Meanwhile, GPT-5.5 Pro offers a significantly larger context window at 1,050,000 tokens vs 200,000 for GPT-5 Pro.
These models target different tiers: GPT-5.5 Pro is a reasoning model while GPT-5 Pro is flagship. This means they're optimized for different workloads. GPT-5.5 Pro is built for complex tasks that require deeper reasoning, while GPT-5 Pro offers better value for routine operations.
Output costs matter too. GPT-5.5 Pro charges $180.00/1M output tokens vs $120.00 for GPT-5 Pro. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. GPT-5 Pro has the edge here at $120.00/1M output tokens.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose GPT-5.5 Pro when:
- • You need a larger context window (1,050,000 tokens)
- • You need longer outputs (up to 128,000 tokens)
- • You're already using OpenAI's API ecosystem
Choose GPT-5 Pro when:
- • Budget is a primary concern
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
GPT-5.5 Pro
- • Input pricing: $30.00/M tokens
- • Output pricing: $180.00/M tokens
- • Context window: 1,050,000 tokens
- • Max output: 128,000 tokens
Watch out for
- • Higher input cost than GPT-5 Pro
- • Higher output cost than GPT-5 Pro
GPT-5 Pro
- • Input pricing: $15.00/M tokens
- • Output pricing: $120.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 100,000 tokens
Watch out for
- • Smaller context window than GPT-5.5 Pro
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
GPT-5.5 Pro (OpenAI)
GPT-5 Pro (OpenAI)
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Which is cheaper, GPT-5.5 Pro or GPT-5 Pro?▼
What is the context window difference between GPT-5.5 Pro and GPT-5 Pro?▼
Which model is better for AI Agent / Agentic Workflows?▼
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