Price Per TokenPrice Per Token
OpenAI
OpenAI
vs
OpenAI
OpenAI

GPT-4o vs GPT-OSS-120b

A detailed comparison of pricing, benchmarks, and capabilities

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116 out of our 296 tracked models have had a price change in January.

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Key Takeaways

GPT-4o wins:

  • Supports vision
  • Supports tool calls

GPT-OSS-120b wins:

  • Cheaper input tokens
  • Cheaper output tokens
  • Larger context window
  • Faster response time
  • Higher intelligence benchmark
  • Better at coding
  • Better at math
Price Advantage
GPT-OSS-120b
Benchmark Advantage
GPT-OSS-120b
Context Window
GPT-OSS-120b
Speed
GPT-OSS-120b

Pricing Comparison

Price Comparison

MetricGPT-4oGPT-OSS-120bWinner
Input (per 1M tokens)$2.50$0.04 GPT-OSS-120b
Output (per 1M tokens)$10.00$0.19 GPT-OSS-120b
Cache Read (per 1M)$1250000.00N/A GPT-4o
Using a 3:1 input/output ratio, GPT-OSS-120b is 98% cheaper overall.

GPT-4o Providers

OpenAI $2.50 (Cheapest)
Vercel $2.50 (Cheapest)
OpenRouter $2.50 (Cheapest)
Azure $2.50 (Cheapest)

GPT-OSS-120b Providers

GMICloud $0.02 (Cheapest)
Chutes $0.04
OpenRouter $0.04
SiliconFlow $0.05
NCompass $0.05

Benchmark Comparison

8
Benchmarks Compared
1
GPT-4o Wins
3
GPT-OSS-120b Wins

Benchmark Scores

BenchmarkGPT-4oGPT-OSS-120bWinner
Intelligence Index
Overall intelligence score
15.632.9
Coding Index
Code generation & understanding
-27.6-
Math Index
Mathematical reasoning
-93.4-
MMLU Pro
Academic knowledge
-80.8-
GPQA
Graduate-level science
52.178.2
LiveCodeBench
Competitive programming
31.787.8
Aider
Real-world code editing
74.441.8
AIME
Competition math
11.7--
GPT-OSS-120b significantly outperforms in coding benchmarks.

Cost vs Quality

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Other models

Context & Performance

Context Window

GPT-4o
128,000
tokens
Max output: 16,384 tokens
GPT-OSS-120b
131,072
tokens
GPT-OSS-120b has a 2% larger context window.

Speed Performance

MetricGPT-4oGPT-OSS-120bWinner
Tokens/second77.3 tok/s337.9 tok/s
Time to First Token0.51s0.42s
GPT-OSS-120b responds 337% faster on average.

Capabilities

Feature Comparison

FeatureGPT-4oGPT-OSS-120b
Vision (Image Input)
Tool/Function Calls
Reasoning Mode
Audio Input
Audio Output
PDF Input
Prompt Caching
Web Search

License & Release

PropertyGPT-4oGPT-OSS-120b
LicenseProprietaryOpen Source
AuthorOpenAIOpenAI
ReleasedMay 2024Aug 2025

GPT-4o Modalities

Input
textimagefile
Output
text

GPT-OSS-120b Modalities

Input
text
Output
text

Related Comparisons

Compare GPT-4o with:

Compare GPT-OSS-120b with:

Frequently Asked Questions

GPT-OSS-120b has cheaper input pricing at $0.04/M tokens. GPT-OSS-120b has cheaper output pricing at $0.19/M tokens.
GPT-OSS-120b scores higher on coding benchmarks with a score of 27.6, compared to GPT-4o's score of N/A.
GPT-4o has a 128,000 token context window, while GPT-OSS-120b has a 131,072 token context window.
GPT-4o supports vision. GPT-OSS-120b does not support vision.