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GPT-5.1 vs Jamba 1.5 Large

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

  • GPT-5.1 has the higher intelligence index (89 vs 42.8)
  • GPT-5.1 is cheaper ($1.25 vs $2.00 per 1M input)
  • GPT-5.1 is faster
  • GPT-5.1 has a larger context window (400K)
GPT-5.1Jamba 1.5 Large
Intelligence index8942.8
DeveloperOpenAIAI21 Labs
TypeLLMLLM
AccessAPI onlyOpen weights
Context window400,000 tokens256,000 tokens
Input price$1.25 / 1M$2.00 / 1M
Output price$10.00 / 1M$8.00 / 1M
Speed115 tok/s100 tok/s
ReleasedNovember 12, 2025August 22, 2024
Parameters398000000000
Input modalitiesText, Image
Output modalitiesText

Shared benchmarks

GPT-5.1
Jamba 1.5 Large
GPQA Diamond
88.1
36.9
Humanity’s Last Exam
26.5
4
LiveCodeBench
86.8
14.3
MMLU-Pro
87
53.5