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Gemini 3.5 Flash vs
GPT-5.5

Read the published evidence, route context, and missing facts before making a local decision. This page does not name a universal winner.

Models in this comparison

Provider identity and evidence state stay balanced across the pair.

G
Model type
Proprietary
Evidence state
Estimated evidence
Published context
1,000,000
VS
O

OpenAI

GPT-5.5

Model type
Proprietary
Evidence state
Estimated evidence
Published context
1,000,000

Key implications

Insufficient shared-metric coverage. Each finding is tied to a published metric, price, context, or modality fact.

  1. Input API price: Gemini 3.5 Flash has the lower verified rate ($1.5 / 1M tokens vs $5 / 1M tokens).
  2. Output API price: Gemini 3.5 Flash has the lower verified rate ($9 / 1M tokens vs $30 / 1M tokens).

Shared metric view

A radar is shown only when at least four compatible supported score metrics are published.

Comparable metric detail

  • AgenticGemini 3.5 Flash: 44.9 · GPT-5.5: 64.71
  • CodingGemini 3.5 Flash: 62.33 · GPT-5.5: 72.5
  • InstructionFollowingGemini 3.5 Flash: 82.4 · GPT-5.5: Unavailable
  • KnowledgeGemini 3.5 Flash: 60.4 · GPT-5.5: 77.7
  • MathGemini 3.5 Flash: 55.9 · GPT-5.5: 71.1
  • MultimodalGroundedGemini 3.5 Flash: 80.6 · GPT-5.5: 65.3
  • ReasoningGemini 3.5 Flash: 62.6 · GPT-5.5: 79
  • OverallGemini 3.5 Flash: 64.73 · GPT-5.5: 72.92

Source metrics

Friendly metric names and published units stay visible. Missing measurements remain unavailable rather than becoming a score.

Source metric comparison
MetricUnitGemini 3.5 FlashGPT-5.5
Agenticscore44.964.71
Codingscore62.3372.5
InstructionFollowingscore82.4Unavailable
Knowledgescore60.477.7
Mathscore55.971.1
MultimodalGroundedscore80.665.3
Reasoningscore62.679
Overallscore64.7372.92

Agentic

Unit
score
Gemini 3.5 Flash
44.9
GPT-5.5
64.71

Coding

Unit
score
Gemini 3.5 Flash
62.33
GPT-5.5
72.5

InstructionFollowing

Unit
score
Gemini 3.5 Flash
82.4
GPT-5.5
Unavailable

Knowledge

Unit
score
Gemini 3.5 Flash
60.4
GPT-5.5
77.7

Math

Unit
score
Gemini 3.5 Flash
55.9
GPT-5.5
71.1

MultimodalGrounded

Unit
score
Gemini 3.5 Flash
80.6
GPT-5.5
65.3

Reasoning

Unit
score
Gemini 3.5 Flash
62.6
GPT-5.5
79

Overall

Unit
score
Gemini 3.5 Flash
64.73
GPT-5.5
72.92

Pricing and context

Verification is shown beside each selected route. Missing facts remain Not verified.

Route pricing and context comparison
FieldUnitGemini 3.5 FlashGPT-5.5
Input API priceUSD / 1M tokens$1.5$5
Cached input API priceUSD / 1M tokens$0.15$0.5
Output API priceUSD / 1M tokens$9$30
Route contexttokens1,000,0001,000,000
Input modalitiespublished listNot verifiedNot verified
Output modalitiespublished listNot verifiedNot verified

Input API price

Unit
USD / 1M tokens
Gemini 3.5 Flash
$1.5
GPT-5.5
$5

Cached input API price

Unit
USD / 1M tokens
Gemini 3.5 Flash
$0.15
GPT-5.5
$0.5

Output API price

Unit
USD / 1M tokens
Gemini 3.5 Flash
$9
GPT-5.5
$30

Route context

Unit
tokens
Gemini 3.5 Flash
1,000,000
GPT-5.5
1,000,000

Input modalities

Unit
published list
Gemini 3.5 Flash
Not verified
GPT-5.5
Not verified

Output modalities

Unit
published list
Gemini 3.5 Flash
Not verified
GPT-5.5
Not verified

Evidence provenance

Source records, route identity, timestamps, and methodology are consolidated here without declaring either model a winner.

Publication time
Sep 14, 2026, 12:37 AM UTC
Freshness
Stale — Published benchmark evidence includes benchlm content observed outside the 8-day evidence window.
Methodology
benchlm: benchlm_raw_composite
Model records
  • Gemini 3.5 Flash — source benchlm · artifact models · model gemini-3-5-flash
  • GPT-5.5 — source benchlm · artifact models · model gpt-5-5
Selected price routes
  • Gemini 3.5 Flash — route benchlm:gemini-3-5-flash · source benchlm · provider google
  • GPT-5.5 — route benchlm:gpt-5-5 · source benchlm · provider openai

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