GPT-4 TurbovsGPT-4.5
OpenAI vs OpenAI — Side-by-side model comparison
Head-to-Head Comparison
| Metric | GPT-4 Turbo | GPT-4.5 |
|---|---|---|
| Provider | ||
| Arena Rank | #5 | #4 |
| Context Window | 128K | 128K |
| Input Pricing | $10.00/1M tokens | $75.00/1M tokens |
| Output Pricing | $30.00/1M tokens | $150.00/1M tokens |
| Parameters | Undisclosed | Undisclosed |
| Open Source | No | No |
| Best For | Complex tasks, coding, analysis, vision | Creative writing, nuanced understanding, EQ tasks |
| Release Date | Apr 9, 2024 | Feb 27, 2025 |
GPT-4 Turbo
GPT-4 Turbo is OpenAI's optimized version of GPT-4, offering the same intelligence at a fraction of the cost and with a significantly larger 128K context window. It includes a knowledge cutoff of April 2024 and supports both text and vision inputs. GPT-4 Turbo delivers faster responses than the original GPT-4 while maintaining the same level of reasoning capability, making it ideal for production applications that need high-quality outputs without the latency or cost of the base GPT-4 model.
View OpenAI profile →GPT-4.5
GPT-4.5 is OpenAI's largest and most knowledge-rich model, designed to excel at creative, nuanced, and emotionally intelligent tasks. Unlike the reasoning-focused o-series models, GPT-4.5 was trained with a massive amount of data to develop deep world knowledge and conversational sophistication. It produces more natural, human-like responses and demonstrates improved understanding of context, tone, and subtext. The model is particularly strong at creative writing, brainstorming, open-ended exploration, and tasks requiring emotional intelligence. However, its premium pricing ($75/1M input tokens) makes it the most expensive OpenAI model, positioning it for use cases where the highest quality creative output justifies the cost. It represents OpenAI's investment in making AI more relatable and conversationally capable.
View OpenAI profile →Key Differences: GPT-4 Turbo vs GPT-4.5
GPT-4.5 ranks higher in arena benchmarks (#4) indicating stronger overall performance.
GPT-4 Turbo is 5.6x cheaper on average, making it the better choice for high-volume applications.
When to use GPT-4 Turbo
- +Budget is a concern and you need cost efficiency
- +Your use case involves complex tasks, coding, analysis, vision
When to use GPT-4.5
- +You need the highest quality output based on arena rankings
- +Quality matters more than cost
- +Your use case involves creative writing, nuanced understanding, eq tasks
Cost Analysis
At current pricing, GPT-4 Turbo is 5.6x more affordable than GPT-4.5. For a typical enterprise workload processing 100M tokens per month:
GPT-4 Turbo monthly cost
$2,000
100M tokens/mo (50/50 in/out)
GPT-4.5 monthly cost
$11,250
100M tokens/mo (50/50 in/out)
The Verdict
GPT-4 Turbo wins our head-to-head comparison with 2 out of 5 category wins. It's the stronger choice for complex tasks, coding, analysis, vision, though GPT-4.5 holds an edge in creative writing, nuanced understanding, eq tasks.
Last compared: March 2026 · Data sourced from public benchmarks and official pricing pages