GPT-5.5 Price Increase: What It Costs
openrouter.ai
May 8, 2026
3 min read
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58/100
Summary
GPT-5.5 has seen a 2x price increase compared to GPT-5.4, with input tokens rising from $2.50/M to $5.00/M and output tokens from $15/M to $30/M. The model produces shorter completions for the same tasks, impacting overall costs for users.
Key Takeaways
- GPT-5.5 launched with a 2x price increase over GPT-5.4, with input tokens rising from $2.50/M to $5.00/M and output tokens from $15/M to $30/M.
- Actual costs for users switching from GPT-5.4 to GPT-5.5 increased between 49% and 92%, depending on prompt length.
- For prompts over 10K tokens, GPT-5.5 generates 19-34% fewer completion tokens, which helps mitigate cost increases.
- Shorter prompts under 10K tokens experienced a higher cost increase, with average costs rising by up to 92%.
Community Sentiment
Positives
- GPT-5.5 demonstrates a significant improvement in understanding user prompts, reducing the need for repeated instructions, which enhances user experience and efficiency.
- There is a perception that GPT-5.5 offers a qualitative difference compared to previous versions, indicating ongoing advancements in model capabilities.
- The model's increased token efficiency suggests potential for better performance at lower operational costs, which could benefit developers and users alike.
Concerns
- Some users feel that recent iterations of LLMs, including GPT-5.5, have not provided a substantial qualitative leap, raising concerns about a potential bottleneck in AI development.
- The rising costs associated with using GPT-5.5, despite improvements, may deter users who are already satisfied with previous models like Opus 4.5.
- There are concerns about the subjective nature of quality assessments, making it difficult to accurately gauge improvements across different models.