How much more expensive is GPT-5.5 than GPT-5.4?

GPT-5.5 costs $5.00/$30.00 per 1M tokens while GPT-5.4 costs $2.50/$15.00 per 1M tokens. GPT-5.5 is exactly 2x more expensive on both input and output. For a typical workload of 1M input + 500K output tokens/month, GPT-5.4 costs $10 vs GPT-5.5's $20 — a $10/month difference. At 10M input + 5M output, the gap grows to $100/month.

Is GPT-5.5 worth 2x the price over GPT-5.4?

GPT-5.5 offers a larger context window (1.05M vs 400K tokens — 2.6x more), premium-tier quality with better reasoning on complex tasks, and access to the latest OpenAI capabilities. GPT-5.4 at $2.50/$15 delivers strong mid-tier quality for most production workloads. Choose GPT-5.5 when you need the 1M+ context window or the highest quality on complex multi-step reasoning. For most use cases, GPT-5.4 offers better value.

Which has a larger context window?

GPT-5.5 has a much larger context window at 1.05M tokens vs GPT-5.4's 400K tokens — 2.6x more context. If your workload involves long documents, large codebases, or extended conversations exceeding 400K tokens, GPT-5.5 is your only option between these two. The context difference is the primary justification for the 2x price premium.

When should I use GPT-5.4 over GPT-5.5?

Choose GPT-5.4 ($2.50/$15) for most production workloads — content generation, code assistance, chatbots, data analysis, and any task where 400K context is sufficient. You get strong mid-tier quality at half the price. Choose GPT-5.5 ($5/$30) when you need the 1.05M context window for long documents, require the absolute best reasoning quality on complex tasks, or want access to premium-tier capabilities.

Can GPT-5.4 handle the same tasks as GPT-5.5?

For most production workloads, GPT-5.4 delivers competitive quality at half the price. It handles coding, content generation, analysis, and general reasoning well. GPT-5.5 excels on the most complex multi-step reasoning tasks and offers 2.6x more context. The quality gap is meaningful but not dramatic — the price gap is exactly 2x. For 80%+ of use cases, GPT-5.4 offers better value per dollar spent.