CtrlAltDebrief

GPT-4.1 vs GPT-4o

API pricing, context window and capabilities for GPT-4.1 and GPT-4o, side by side. Prices are the cheapest listed serving route per 1M tokens, from LiteLLM and OpenRouter.

Verdict

computed from the published numbers

GPT-4.1 wins on price, on intelligence and on context window. Benchmark data is unavailable for one or both models.

Price
GPT-4.1
Terminal-Bench
Not called
Intelligence
GPT-4.1
Context window
GPT-4.1

Key takeaways

who wins on what, from the published numbers

GPT-4.1 wins

  • Cheaper input ($2.00 vs $2.50 /1M)
  • Cheaper output ($8.00 vs $10.00 /1M)
  • Larger context window (1M vs 131K)
  • Higher max output (33K vs 16K)
  • Has web search

GPT-4o wins

  • Supports audio
Cheaper overall
GPT-4.1
$2.00 + $8.00 /1M
Larger context
GPT-4.1
1M
More providers
Tied

Pricing & specs

cheapest listed route · per 1M tokens
On-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments can be materially lower.
GPT-4.1GPT-4o
Input $/1M$2.00via OpenAI best$2.50via OpenAI
Output $/1M$8.00via OpenAI best$10.00via OpenAI
Context window1M best131K
Max output33K best16K
Serving providers6 6
DateFirst listed Apr 2025 Released May 13, 2024

Benchmarks

Benchmark scores, side by side
GPT-4.1GPT-4o
Intelligence12.7 best8.4
GPQA Diamond67% best54%
Output speed151 t/s best150 t/s
Latency (TTFT)0.88s 0.79s best

Cost calculator

choose a serving route for each side
Input tokens / month
Output tokens / month
GPT-4.1
via Azure
$18
GPT-4o
via Gmi
$23

Capabilities

feature support, side by side
FeatureGPT-4.1GPT-4o
Vision✓✓
Tool use✓✓
Reasoning——
Audio—✓
Prompt caching✓✓
Structured output✓✓
Web search✓—

Related comparisons

Compare GPT-4.1 with

Claude 4 Opus

Frequently asked questions

Which is cheaper, GPT-4.1 or GPT-4o?
GPT-4.1 is cheaper for input ($2.00 vs $2.50 per 1M tokens) from OpenAI. GPT-4.1 is cheaper for output ($8.00 vs $10.00 per 1M tokens) from OpenAI.
What is the context window difference between GPT-4.1 and GPT-4o?
GPT-4.1 has a 1M-token context window and GPT-4o has 131K tokens, so GPT-4.1 can take a larger prompt.
How do GPT-4.1 and GPT-4o compare on benchmarks?
On the tracked benchmarks, GPT-4.1 leads on intelligence.
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Oct 14, 2026

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