GPT-4o vs GPT-5 Chat
API pricing, context window and capabilities for GPT-4o and GPT-5 Chat, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numbersGPT-4o wins on context window. GPT-5 Chat wins on price. Benchmark data is unavailable for one or both models.
Price
GPT-5 Chat
Coding
Not called
Intelligence
Not called
Context window
GPT-4o
Key takeaways
who wins on what, from the published numbersGPT-4o wins
- Larger context window (131K vs 128K)
- More serving providers (6 vs 3)
- Supports audio
GPT-5 Chat wins
- Cheaper input ($2.50 vs $1.25 /1M)
- Has reasoning mode
Cheaper overall
GPT-5 Chat
$1.25 + $10.00 /1M
Larger context
GPT-4o
131K
More providers
GPT-4o
6 providers
Pricing & specs
cheapest serving route · per 1M tokens| GPT-4o | GPT-5 Chat | |
|---|---|---|
| Input $/1M | $2.50 | $1.25 best |
| Output $/1M | $10.00 | $10.00 |
| Context window | 131K best | 128K |
| Max output | 16K | 16K |
| Serving providers | 6 best | 3 |
| Released | 2024-05-13 | 2025-08-07 |
Benchmarks
Artificial Analysis indices, side by side| GPT-4o | GPT-5 Chat | |
|---|---|---|
| Intelligence | 11.2 | Not available |
| GPQA Diamond | 54% | Not available |
| Output speed | 99 t/s | Not available |
| Latency (TTFT) | 5.19s | Not available |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
GPT-4o
via Azure
$23
GPT-5 Chat
via Azure
$16
Capabilities
feature support, side by side| Feature | GPT-4o | GPT-5 Chat |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | — | ✓ |
| Audio | ✓ | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | — |
Related comparisons
Frequently asked questions
Which is cheaper, GPT-4o or GPT-5 Chat?
GPT-5 Chat is cheaper for input ($2.50 vs $1.25 per 1M tokens).
What is the context window difference between GPT-4o and GPT-5 Chat?
GPT-4o has a 131K-token context window and GPT-5 Chat has 128K tokens, so GPT-4o can take a larger prompt.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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