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GPT-5.5 vs GPT-5.4 Pro
OpenAI family showdown — GPT-5.5 is 83% cheaper on both input and output. When does the Pro premium make sense?
Pricing data verified: Jun 29, 2026
| Specification | GPT-5.5 | GPT-5.4 Pro |
|---|---|---|
| Input Price (per 1M tokens) | $5.00 | $30.00 |
| Output Price (per 1M tokens) | $30.00 | $180.00 |
| Context Window | 1.05M tokens | 400K tokens |
| Tier | Mid-Premium | Premium |
| Provider | OpenAI | OpenAI |
| Input Savings | 83% cheaper | Baseline |
| Output Savings | 83% cheaper | Baseline |
| Cost at 1M input + 500K output | $20.00 | $120.00 |
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Which Model for Which Use Case?
Cost-Effective Production
GPT-5.5 delivers excellent quality at $5/$30 per million tokens — 83% cheaper than GPT-5.4 Pro on both input and output. For most production workloads including chatbots, code assistants, and content generation, GPT-5.5 is the clear winner.
Maximum Reasoning Power
GPT-5.4 Pro's enhanced chain-of-thought reasoning excels at complex multi-step analytical tasks. If your use case demands the absolute highest quality reasoning and cost is secondary, GPT-5.4 Pro delivers.
Enterprise Cost Optimization
At 1M requests/month with 500K output tokens, GPT-5.5 saves $100/month compared to GPT-5.4 Pro. For enterprise-scale deployments, the 83% cost difference translates to $12,000/year in savings.
Context Window Needs
GPT-5.5 offers 1.05M context vs GPT-5.4 Pro's 400K. If your application needs long document processing or large codebase analysis, GPT-5.5 gives you 2.6x more context at 83% lower cost.
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Frequently Asked Questions
Is GPT-5.5 cheaper than GPT-5.4 Pro?
Yes — GPT-5.5 is dramatically cheaper. GPT-5.5 costs $5.00/M input and $30/M output, while GPT-5.4 Pro costs $30/M input and $180/M output. That's 83% cheaper on both input and output.
Which is better for coding — GPT-5.5 or GPT-5.4 Pro?
GPT-5.4 Pro has enhanced reasoning capabilities, but GPT-5.5 delivers comparable quality for most coding tasks at 83% lower cost. Unless you need GPT-5.4 Pro's specialized chain-of-thought for complex multi-step reasoning, GPT-5.5 is the better value.
How much would I save using GPT-5.5 instead of GPT-5.4 Pro?
For a workload of 1M input + 500K output tokens/month, GPT-5.5 costs $20/month vs GPT-5.4 Pro's $120/month — saving $100/month (83%). At scale (10M input + 5M output), you save $1,000/month — $12,000/year.
When should I choose GPT-5.4 Pro over GPT-5.5?
Choose GPT-5.4 Pro when: (1) you need the absolute best chain-of-thought reasoning, (2) cost is not a primary concern, (3) you need enhanced multi-step problem solving for complex analytical tasks. For everything else, GPT-5.5 delivers excellent quality at 83% lower cost.
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