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  1. Home
  2. /
  3. Compare

GPT-5.1-Codex-Mini vs INTELLECT-3

Compare GPT-5.1-Codex-Mini from OpenAI and INTELLECT-3 from prime-intellect on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the OpenRouter API.

Favicon for openai
GPT-5.1-Codex-Mini
Favicon for prime-intellect
INTELLECT-3
Favicon for openai
GPT-5.1-Codex-Mini
Favicon for prime-intellect
INTELLECT-3

Overview

GPT-5.1-Codex-Mini
Author
OpenAI
INTELLECT-3
Author
prime-intellect
GPT-5.1-Codex-Mini
Context length
400Ktokens
INTELLECT-3
Context length
131Ktokens
GPT-5.1-Codex-Mini
Reasoning
INTELLECT-3
Reasoning
GPT-5.1-Codex-Mini
Input modalities
INTELLECT-3
Input modalities
GPT-5.1-Codex-Mini
Output modalities
INTELLECT-3
Output modalities

GPT-5.1-Codex-Mini vs INTELLECT-3: side-by-side summary

GPT-5.1-Codex-Mini and INTELLECT-3 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5.1-Codex-Mini, from OpenAI, has a 400,000-token context window and is priced at $0.25/M tokens input, $2/M tokens output on OpenRouter.

INTELLECT-3, from prime-intellect, has a 131,072-token context window and is priced by the provider serving it on OpenRouter.

Context window
  • GPT-5.1-Codex-Mini: 400,000 tokens
  • INTELLECT-3: 131,072 tokens
Price
  • GPT-5.1-Codex-Mini: $0.25/M tokens input, $2/M tokens output
  • INTELLECT-3: Pricing varies by provider
Provided by
  • GPT-5.1-Codex-Mini: OpenAI
  • INTELLECT-3: prime-intellect
  • GPT-5.1-Codex-Mini model details, providers and pricing
  • INTELLECT-3 model details, providers and pricing

GPT-5.1-Codex-Mini vs INTELLECT-3 at a glance

GPT-5.1-Codex-Mini vs INTELLECT-3 comparison
AttributeGPT-5.1-Codex-MiniINTELLECT-3
Input price$0.25/M tokensPricing varies by provider
Output price$2/M tokensPricing varies by provider
Context window400,000 tokens131,072 tokens
Intelligence Index20.410.6
Coding IndexNot availableNot available
Agentic IndexNot availableNot available
Latency (p50)4.34 sNot available
Throughput (p50)86.0 tok/sNot available

Benchmark data updated Oct 5, 2026

Frequently asked questions

Which has the longer context window, GPT-5.1-Codex-Mini or INTELLECT-3?

GPT-5.1-Codex-Mini has the longer context window at 400,000 tokens, compared with 131,072 tokens for INTELLECT-3.