Introducing Gemini 1.5 (Pro & Flash)GoogleReleased February 15, 2024

Gemini 1.5 (Pro & Flash)

Google’s breakthrough long-context model featuring an unprecedented 2-million-token window with Mixture of Experts efficiency.

text-to-textProprietary API$1.25 / 1M tok (1.5 Pro) | $0.075 (Flash)Context: 2M (2,000,000 tokens)Arena ELO: 1290

Technical Specifications

Architecture Type
Mixture of Experts (MoE) Transformer
Total Parameters
Pro & Flash tiers
Context Window
2M (2,000,000 tokens)
Max Output Tokens
8.192K (8,192 tokens)
Knowledge Cutoff
May 2024
Supported Modalities
text, code, vision, audio, video
License & Access
Google Cloud API Terms of Service

Benchmark Evaluations

Mmlu
85.9
Math500
67.7
Humaneval
84.1
Needle In Haystack
99.7
Chatbot Arena ELO
1290

Deep Architectural Overview

Gemini 1.5 introduced a dramatic generational upgrade via a sparse Mixture-of-Experts (MoE) architecture. It achieved near-perfect (99.7%) recall across up to 2 million tokens of multimodal context, capable of analyzing 1 hour of video, 11 hours of audio, or 700,000 words in a single prompt.

Strengths & Considerations

Core Strengths
  • World-first 2M token context window
  • High recall on complex multimodal data (1 hour of video)
  • Affordable sub-second Flash tier
Known Limitations
  • Pre-dates native chain-of-thought reasoning models

Token & API Pricing

Input Tokens (1M)$1.25
Output Tokens (1M)$5.00
Cached Input (1M)$0.3125
Pricing is verified directly against Google's developer documentation and API rate sheets.

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