Price Per TokenPrice Per Token
OpenAI
OpenAI
vs
OpenAI
OpenAI

GPT-4 vs GPT-OSS-20b

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-4 wins:

  • Supports tool calls

GPT-OSS-20b 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-20b
Benchmark Advantage
GPT-OSS-20b
Context Window
GPT-OSS-20b
Speed
GPT-OSS-20b

Pricing Comparison

Price Comparison

MetricGPT-4GPT-OSS-20bWinner
Input (per 1M tokens)$30.00$0.02 GPT-OSS-20b
Output (per 1M tokens)$60.00$0.10 GPT-OSS-20b
Using a 3:1 input/output ratio, GPT-OSS-20b is 100% cheaper overall.

GPT-4 Providers

OpenAI $30.00 (Cheapest)
OpenRouter $30.00 (Cheapest)
Azure $30.00 (Cheapest)

GPT-OSS-20b Providers

GMICloud $0.02 (Cheapest)
DeepInfra $0.03
Parasail $0.04
Phala $0.04
SiliconFlow $0.04

Benchmark Comparison

7
Benchmarks Compared
0
GPT-4 Wins
2
GPT-OSS-20b Wins

Benchmark Scores

BenchmarkGPT-4GPT-OSS-20bWinner
Intelligence Index
Overall intelligence score
12.824.7
Coding Index
Code generation & understanding
13.118.1
Math Index
Mathematical reasoning
-89.3-
MMLU Pro
Academic knowledge
-74.8-
GPQA
Graduate-level science
-68.8-
LiveCodeBench
Competitive programming
-77.7-
Aider
Real-world code editing
67.7--
GPT-OSS-20b significantly outperforms in coding benchmarks.

Cost vs Quality

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Other models

Context & Performance

Context Window

GPT-4
8,191
tokens
Max output: 4,096 tokens
GPT-OSS-20b
131,072
tokens
Max output: 131,072 tokens
GPT-OSS-20b has a 94% larger context window.

Speed Performance

MetricGPT-4GPT-OSS-20bWinner
Tokens/second25.4 tok/s309.0 tok/s
Time to First Token0.81s0.51s
GPT-OSS-20b responds 1119% faster on average.

Capabilities

Feature Comparison

FeatureGPT-4GPT-OSS-20b
Vision (Image Input)
Tool/Function Calls
Reasoning Mode
Audio Input
Audio Output
PDF Input
Prompt Caching
Web Search

License & Release

PropertyGPT-4GPT-OSS-20b
LicenseProprietaryOpen Source
AuthorOpenAIOpenAI
ReleasedMay 2023Aug 2025

GPT-4 Modalities

Input
text
Output
text

GPT-OSS-20b Modalities

Input
text
Output
text

Related Comparisons

Compare GPT-4 with:

Compare GPT-OSS-20b with:

Frequently Asked Questions

GPT-OSS-20b has cheaper input pricing at $0.02/M tokens. GPT-OSS-20b has cheaper output pricing at $0.10/M tokens.
GPT-OSS-20b scores higher on coding benchmarks with a score of 18.1, compared to GPT-4's score of 13.1.
GPT-4 has a 8,191 token context window, while GPT-OSS-20b has a 131,072 token context window.
GPT-4 does not support vision. GPT-OSS-20b does not support vision.