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GPT-5 Pro vs Jamba 1.5 Large

OpenAI vs AI21 Labs — benchmarks, pricing, and capabilities side by side.

  • GPT-5 Pro has the higher intelligence index (88.4 vs 42.8)
  • Jamba 1.5 Large is cheaper ($2.00 vs $15.00 per 1M input)
  • GPT-5 Pro has a larger context window (400K)
GPT-5 ProJamba 1.5 Large
Intelligence index88.442.8
DeveloperOpenAIAI21 Labs
TypeLLMLLM
AccessAPI onlyOpen weights
Context window400,000 tokens256,000 tokens
Input price$15.00 / 1M$2.00 / 1M
Output price$120.00 / 1M$8.00 / 1M
Speed100 tok/s
ReleasedOctober 6, 2025August 22, 2024
Parameters398000000000
Input modalitiesText, Image
Output modalitiesText

Shared benchmarks

GPT-5 Pro
Jamba 1.5 Large
GPQA Diamond
88.4
36.9
Humanity’s Last Exam
42
4