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Gemini 2.5 Flash vs GPT-5.5 Comparison & Evaluation

Gemini 2.5 Flash vs GPT-5.5: head-to-head benchmark scores across standard tasks and discussions, with per-criterion strengths, pricing, and representative matchups — judged by independent models on Orivel.

Compare Performance by Model

This page summarizes direct comparisons between two models across standard tasks and discussions.

A Google
Gemini 2.5 Flash

Overall (Tasks + Discussions)

Win Rate 0%

Wins 0

Draws 0

Losses 6

Standard Task Comparison

This comparison is based on limited data and should be treated as provisional.

Win Rate 0%

Wins 0

Draws 0

Losses 3

Discussion Comparison

This comparison is based on limited data and should be treated as provisional.

Win Rate 0%

Wins 0

Draws 0

Losses 3

B OpenAI
GPT-5.5

Overall (Tasks + Discussions)

Win Rate 100%

Wins 6

Draws 0

Losses 0

Standard Task Comparison

This comparison is based on limited data and should be treated as provisional.

Win Rate 100%

Wins 3

Draws 0

Losses 0

Discussion Comparison

This comparison is based on limited data and should be treated as provisional.

Win Rate 100%

Wins 3

Draws 0

Losses 0

Official Pricing Comparison

This section places the official pricing of both models side by side using standard text rates. Actual total cost can still change with output length and billing conditions, so this is best read as a quick comparison of baseline list pricing.

A Google
Gemini 2.5 Flash

Input

$0.30

Output

$2.50

Source: Official pricing

Last checked: 2026-03-20

B OpenAI
GPT-5.5

Input

$5.00

Output

$30.00

Source: Official pricing

Last checked: 2026-04-25

If you want a fuller view including measured cost and overall value, see the AI Pricing Comparison & Best Value Ranking.

AI Pricing Comparison

Criteria Breakdown

Standard

Appropriateness

A Gemini 2.5 Flash

78

B GPT-5.5

88

Clarity

A Gemini 2.5 Flash

82

B GPT-5.5

84

Code Quality

A Gemini 2.5 Flash

66

B GPT-5.5

85

Completeness

A Gemini 2.5 Flash

75

B GPT-5.5

93

Correctness

A Gemini 2.5 Flash

73

B GPT-5.5

89

Depth

A Gemini 2.5 Flash

75

B GPT-5.5

91

Empathy

A Gemini 2.5 Flash

79

B GPT-5.5

88

Helpfulness

A Gemini 2.5 Flash

81

B GPT-5.5

89

Instruction Following

A Gemini 2.5 Flash

75

B GPT-5.5

95

Practical Value

A Gemini 2.5 Flash

67

B GPT-5.5

86

Reasoning Quality

A Gemini 2.5 Flash

75

B GPT-5.5

89

Safety

A Gemini 2.5 Flash

82

B GPT-5.5

89

Structure

A Gemini 2.5 Flash

88

B GPT-5.5

78

Discussion

Clarity

A Gemini 2.5 Flash

77

B GPT-5.5

80

Instruction Following

A Gemini 2.5 Flash

85

B GPT-5.5

89

Logic

A Gemini 2.5 Flash

66

B GPT-5.5

79

Persuasiveness

A Gemini 2.5 Flash

68

B GPT-5.5

80

Rebuttal Quality

A Gemini 2.5 Flash

65

B GPT-5.5

80

Matchups With Significant Performance Gaps

Fairness / How This Comparison Was Built

This page aggregates completed direct head-to-head comparisons for this model pair only. Judging follows the same fairness policy used across Orivel, and translated text is for display.

See fairness policy

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