CtrlAltDebrief

GPT-4o vs o3

API pricing, context window and capabilities for GPT-4o and o3, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.

Verdict

computed from the published numbers

o3 wins on price, on intelligence and on context window. Benchmark data is unavailable for one or both models.

Price
o3
Coding
Not called
Intelligence
o3
Context window
o3

Key takeaways

who wins on what, from the published numbers

GPT-4o wins

  • More serving providers (6 vs 3)
  • Supports audio

o3 wins

  • Cheaper input ($2.50 vs $2.00 /1M)
  • Cheaper output ($10.00 vs $8.00 /1M)
  • Larger context window (131K vs 200K)
  • Higher max output (16K vs 100K)
  • Has reasoning mode
  • Has web search
Cheaper overall
o3
$2.00 + $8.00 /1M
Larger context
o3
200K
More providers
GPT-4o
6 providers

Pricing & specs

cheapest serving route · per 1M tokens
GPT-4oo3
Input $/1M$2.50 $2.00 best
Output $/1M$10.00 $8.00 best
Context window131K 200K best
Max output16K 100K best
Serving providers6 best3
Released2024-05-13 2025-04-16

Benchmarks

Artificial Analysis indices, side by side
GPT-4oo3
Intelligence11.2 30.4 best
GPQA Diamond54% 83% best
Output speed99 t/s 146 t/s best
Latency (TTFT)5.19s 5.11s best

Cost calculator

choose a serving route for each side
Input tokens / month
Output tokens / month
GPT-4o
via Azure
$23
o3
via Azure
$18

Capabilities

feature support, side by side
FeatureGPT-4oo3
Vision✓✓
Tool use✓✓
Reasoning—✓
Audio✓—
Prompt caching✓✓
Structured output✓✓
Web search—✓

Related comparisons

Compare o3 with

Claude 4 Opus

Frequently asked questions

Which is cheaper, GPT-4o or o3?
o3 is cheaper for input ($2.50 vs $2.00 per 1M tokens). o3 is cheaper for output ($10.00 vs $8.00 per 1M tokens).
What is the context window difference between GPT-4o and o3?
GPT-4o has a 131K-token context window and o3 has 200K tokens, so o3 can take a larger prompt.
How do GPT-4o and o3 compare on benchmarks?
On the tracked Artificial Analysis indices, o3 leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily

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