Price Per TokenPrice Per Token
OpenAI
OpenAI
vs
OpenAI
OpenAI

GPT-5 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-5 wins:

  • Larger context window
  • Higher intelligence benchmark
  • Better at coding
  • Better at math
  • Supports vision
  • Supports tool calls

GPT-OSS-120b wins:

  • Cheaper input tokens
  • Cheaper output tokens
  • Faster response time
Price Advantage
GPT-OSS-120b
Benchmark Advantage
GPT-5
Context Window
GPT-5
Speed
GPT-OSS-120b

Pricing Comparison

Price Comparison

MetricGPT-5GPT-OSS-120bWinner
Input (per 1M tokens)$1.25$0.04 GPT-OSS-120b
Output (per 1M tokens)$10.00$0.19 GPT-OSS-120b
Cache Read (per 1M)$125000.00N/A GPT-5
Using a 3:1 input/output ratio, GPT-OSS-120b is 98% cheaper overall.

GPT-5 Providers

OpenAI $1.25 (Cheapest)
OpenRouter $1.25 (Cheapest)
Azure $1.25 (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
6
GPT-5 Wins
1
GPT-OSS-120b Wins

Benchmark Scores

BenchmarkGPT-5GPT-OSS-120bWinner
Intelligence Index
Overall intelligence score
44.132.9
Coding Index
Code generation & understanding
34.627.6
Math Index
Mathematical reasoning
94.393.4
MMLU Pro
Academic knowledge
87.180.8
GPQA
Graduate-level science
85.478.2
LiveCodeBench
Competitive programming
84.687.8
Aider
Real-world code editing
88.041.8
AIME
Competition math
95.7--
GPT-5 significantly outperforms in coding benchmarks.

Cost vs Quality

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GPT-5
Other models

Context & Performance

Context Window

GPT-5
400,000
tokens
Max output: 128,000 tokens
GPT-OSS-120b
131,072
tokens
GPT-5 has a 67% larger context window.

Speed Performance

MetricGPT-5GPT-OSS-120bWinner
Tokens/second115.8 tok/s337.9 tok/s
Time to First Token100.46s0.42s
GPT-OSS-120b responds 192% faster on average.

Capabilities

Feature Comparison

FeatureGPT-5GPT-OSS-120b
Vision (Image Input)
Tool/Function Calls
Reasoning Mode
Audio Input
Audio Output
PDF Input
Prompt Caching
Web Search

License & Release

PropertyGPT-5GPT-OSS-120b
LicenseProprietaryOpen Source
AuthorOpenAIOpenAI
ReleasedAug 2025Aug 2025

GPT-5 Modalities

Input
textimagefile
Output
text

GPT-OSS-120b Modalities

Input
text
Output
text

Related Comparisons

Compare GPT-5 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-5 scores higher on coding benchmarks with a score of 34.6, compared to GPT-OSS-120b's score of 27.6.
GPT-5 has a 400,000 token context window, while GPT-OSS-120b has a 131,072 token context window.
GPT-5 supports vision. GPT-OSS-120b does not support vision.