Pairwise benchmark snapshot · Aug 16, 2026

Gemini 1.5 Pro vs Gemini 3.7 Flash benchmark

Name: Gemini 1.5 Pro vs Gemini 3.7 Flash AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

This page compares Gemini 1.5 Pro (Google) and Gemini 3.7 Flash (Google) using the latest snapshots we have as of Aug 16, 2026. On preference Elo, Gemini 3.7 Flash is ahead by 270 points (1,530 vs 1,260; seed-bootstrap (Aug 16, 2026)). On SWE-bench coding, Gemini 3.7 Flash resolves 72.4% versus 38% (seed-bootstrap (Aug 16, 2026)). Gemini 3.7 Flash streams faster (215 tok/s) while Gemini 3.7 Flash is the cheaper output token ($1.88/1M). Gemini 1.5 Pro has the larger context window (2M tokens). Every cell below is a dated snapshot from a named public source — we do not invent missing scores, and we do not run SWE-bench ourselves.

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Google

Gemini 1.5 Pro

First million-token Gemini Pro. Baseline for 1.5 vs 2.5 vs 3.x Pro.

Elo 1,260$5/1M out

Google

Gemini 3.7 Flash

Google Aug 13 2026 workhorse. Official intro price $0.75/$3.75 per 1M through Dec 31 2026; 1,048,576-token context (Google blog).

Elo 1,530$1.875/1M out

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Quick vs:vs Claude Opus 4.5 vs Claude Opus 4.6 vs Claude Sonnet 4.5 vs Claude 3.7 Sonnet

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Gemini 1.5 Pro (1)vsGemini 3.7 Flash (9)

Gemini 1.5 Pro: 1W (10%)Overall: Gemini 3.7 FlashGemini 3.7 Flash: 9W (90%)

← Gemini 1.5 ProGemini 3.7 Flash →

Gemini 3.7 Flash (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,260vs1,530

Coding Elo

—vs1,546

SWE-bench

38%vs72.4%

LiveBench

49.2%vs69.6%

GPQA Diamond

58%vs81.2%

Gemini 1.5 Pro: 0WGemini 3.7 Flash: 5W

Gemini 3.7 Flash (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

70 tok/svs215 tok/s

Time to first token

240 msvs82 ms

Gemini 1.5 Pro: 0WGemini 3.7 Flash: 2W

Gemini 3.7 Flash (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$5/1Mvs$1.88/1M

Input price

$1.25/1Mvs$0.38/1M

Context window

2Mvs1M

Gemini 1.5 Pro: 1WGemini 3.7 Flash: 2W

Capability Matchup Radar

Multi-Dimensional Capability Radar

Each spoke is a skill. Farther from the center is better (0–100th percentile). Tap any dot to inspect details.

Tap any node to inspect

Percentile 0–100

Dimensional AdvantageGemini 3.7 Flash 5/6

Preference Elo

Gemini 3.7 Flash

270 pts advantage

Throughput Speed

Gemini 3.7 Flash

145 tok/s faster

Price Efficiency

Gemini 3.7 Flash

$3.13/1M cheaper

Full Benchmark Score Matrix

—

Elo

High is better

1,260

EloHigh is better

1,530+21%

Code Elo

High is better

—

Code EloHigh is better

1,546

LiveBench

High is better

49.2%

LiveBenchHigh is better

69.6%+41%

SWE-bench

High is better

38%

SWE-benchHigh is better

72.4%+91%

GPQA

High is better

58%

GPQAHigh is better

81.2%+40%

TTFT

Low is better

240 ms

TTFTLow is better

82 ms+193%

Speed

High is better

70 tok/s

SpeedHigh is better

215 tok/s+207%

In $

Low is better

$1.25/1M

In $Low is better

$0.38/1M+233%

Out $

Low is better

$5/1M

Out $Low is better

$1.88/1M+167%

Context

High is better

+91%2M

ContextHigh is better

Interactive Simulator

Workload Cost & Savings Calculator

Simulate monthly production API costs based on published $/1M tokens.

Save up to 65% with Gemini 3.7 Flash

Monthly Volume50M tokens/mo

Quick Presets:

Token Ratio (In vs Out)70% In / 30% Out

RAG / Search (10% out)Coding / Chat (50% out)

Gemini 1.5 Pro$118.75 / mo

In: $43.75Out: $75.00

Gemini 3.7 Flash$41.25 / mo

In: $13.13Out: $28.13

Estimated Cost Delta

Gemini 3.7 Flash is estimated to save $77.50/month ($930/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

1
Gemini 3.7 Flash:Pick Gemini 3.7 Flash when repo-level coding accuracy is the constraint.
2
Gemini 3.7 Flash:Pick Gemini 3.7 Flash when time-to-first-token matters more than peak Elo.
3
Gemini 1.5 Pro:Pick Gemini 1.5 Pro for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsGemini 3.7 Flash

Higher SWE-bench (72.4%).

High-volume chatGemini 3.7 Flash

Lower output list price ($1.88/1M).

Voice / low-latency UIGemini 3.7 Flash

Lower TTFT (82 ms).

Long-document RAGGemini 1.5 Pro

Larger window (2M).

Screenshots / visionGemini 3.7 Flash

Both accept images. Defaulting to the higher-Elo side (Gemini 3.7 Flash).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Gemini 3.7 Flash	Higher SWE-bench (72.4%).
High-volume chat	Gemini 3.7 Flash	Lower output list price ($1.88/1M).
Voice / low-latency UI	Gemini 3.7 Flash	Lower TTFT (82 ms).
Long-document RAG	Gemini 1.5 Pro	Larger window (2M).
Screenshots / vision	Gemini 3.7 Flash	Both accept images. Defaulting to the higher-Elo side (Gemini 3.7 Flash).

Related Editorial Dispatches & Benchmark Notes

View all news

compareAug 13, 2026

Gemini Flash vs Pro: when Flash is the whole product

3.7 Flash vs 3.6 Pro is the current Google volume-versus-upgrade pair.

priceAug 13, 2026

Gemini 3.6 Flash (Jul 21) now shares the 3.7 intro rate

Jul 21 workhorse that inherited $0.75/$3.75 through year-end. Keep the row; 3.7 is the newer sibling.

launchAug 13, 2026

Gemini 3.7 Flash (Aug 13): $0.75/$3.75 intro through Dec 31 2026

Google’s current workhorse drop. Official intro list and 1,048,576-token context. Compare to Luna and Haiku.

launchJul 15, 2026

Gemini 3.6 Pro: Google’s current Pro-class long-context row

2M context, Pro-class Elo and coding. Upgrade path from Flash is this page, not a vibe check.

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LIVE

Google

Gemini 1.5 Pro

Elo 1,260

LiveBench49.2%

SWE-bench38%

Speed70 tok/s

Output cost$5/1M

Google

Gemini 3.7 Flash

Elo 1,530

LiveBench69.6%

SWE-bench72.4%

Speed215 tok/s

Output cost$1.88/1M

Frequently Asked Questions

Which is better overall, Gemini 1.5 Pro or Gemini 3.7 Flash?: Gemini 3.7 Flash has the higher preference Elo in our latest snapshot (1,530). “Better” still depends on coding, price, and latency — see the table.
Which is better at coding, Gemini 1.5 Pro or Gemini 3.7 Flash?: Gemini 3.7 Flash leads SWE-bench at 72.4% vs 38%. SWE-bench is one harness, not your repo.
Which is cheaper to run in production?: Gemini 3.7 Flash output tokens are $1.88/1M versus $5/1M. Input prices and retry rates still move the real bill.
Which is faster, Gemini 1.5 Pro or Gemini 3.7 Flash?: Gemini 3.7 Flash has the lower time-to-first-token (82 ms vs 240 ms). Tokens/sec is a separate column if you care about long completions.
Which has the larger context window?: Gemini 1.5 Pro accepts 2M tokens versus 1M.
Can I self-host either model?: Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?: No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?: Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Gemini 1.5 Pro and Gemini 3.7 Flash Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Gemini 1.5 Pro matchups →|All Gemini 3.7 Flash matchups →

Gemini 1.5 Pro vs Gemini 2.5 Pro (next gemini-pro)Gemini 3.7 Flash vs Gemini 3.6 Flash (previous gemini-flash)Gemini 3 Pro vs Gemini 3.7 Flash Gemini 3 Flash vs Gemini 3.7 Flash Gemini 2.0 Flash Thinking vs Gemini 3.7 Flash Gemini 3.6 Pro vs Gemini 3.7 Flash

Gemini 1.5 Pro vs Gemini 3.7 Flash benchmark

Interactive Comparison Diagram

Matchup Breakdown

Tug-of-War Matchup Matrix

Category wins across intelligence, speed, and pricing efficiency.

Gemini 1.5 Pro (1)vsGemini 3.7 Flash (9)

Gemini 1.5 Pro: 1W (10%)Overall: Gemini 3.7 FlashGemini 3.7 Flash: 9W (90%)

← Gemini 1.5 ProGemini 3.7 Flash →

Gemini 3.7 Flash (5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Preference Elo

1,260vs1,530

Coding Elo

—vs1,546

SWE-bench

38%vs72.4%

LiveBench

49.2%vs69.6%

GPQA Diamond

58%vs81.2%

Gemini 1.5 Pro: 0WGemini 3.7 Flash: 5W

Gemini 3.7 Flash (2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Output speed

70 tok/svs215 tok/s

Time to first token

240 msvs82 ms

Gemini 1.5 Pro: 0WGemini 3.7 Flash: 2W

Gemini 3.7 Flash (2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Output price

$5/1Mvs$1.88/1M

Input price

$1.25/1Mvs$0.38/1M

Context window

2Mvs1M

Gemini 1.5 Pro: 1WGemini 3.7 Flash: 2W

Recommended Workload Routing

Repo / coding agentsGemini 3.7 Flash

Higher SWE-bench (72.4%).

High-volume chatGemini 3.7 Flash

Lower output list price ($1.88/1M).

Voice / low-latency UIGemini 3.7 Flash

Lower TTFT (82 ms).

Long-document RAGGemini 1.5 Pro

Larger window (2M).

Screenshots / visionGemini 3.7 Flash

Both accept images. Defaulting to the higher-Elo side (Gemini 3.7 Flash).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	Gemini 3.7 Flash	Higher SWE-bench (72.4%).
High-volume chat	Gemini 3.7 Flash	Lower output list price ($1.88/1M).
Voice / low-latency UI	Gemini 3.7 Flash	Lower TTFT (82 ms).
Long-document RAG	Gemini 1.5 Pro	Larger window (2M).
Screenshots / vision	Gemini 3.7 Flash	Both accept images. Defaulting to the higher-Elo side (Gemini 3.7 Flash).

Frequently Asked Questions

Which is better overall, Gemini 1.5 Pro or Gemini 3.7 Flash?

Gemini 3.7 Flash has the higher preference Elo in our latest snapshot (1,530). “Better” still depends on coding, price, and latency — see the table.

Which is better at coding, Gemini 1.5 Pro or Gemini 3.7 Flash?

Gemini 3.7 Flash leads SWE-bench at 72.4% vs 38%. SWE-bench is one harness, not your repo.

Which is cheaper to run in production?

Gemini 3.7 Flash output tokens are $1.88/1M versus $5/1M. Input prices and retry rates still move the real bill.

Which is faster, Gemini 1.5 Pro or Gemini 3.7 Flash?

Gemini 3.7 Flash has the lower time-to-first-token (82 ms vs 240 ms). Tokens/sec is a separate column if you care about long completions.

Which has the larger context window?

Gemini 1.5 Pro accepts 2M tokens versus 1M.

Can I self-host either model?

Neither model is marked open-weights here. You are comparing hosted APIs.

Are these scores from CompareLLM’s own evals?

No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.

What does preference Elo mean on this page?

Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Gemini 1.5 Pro and Gemini 3.7 Flash Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Gemini 3.7 Flash

Gemini 3.7 Flash

Gemini 3.7 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Gemini Flash vs Pro: when Flash is the whole product

Gemini 3.6 Flash (Jul 21) now shares the 3.7 intro rate

Gemini 3.7 Flash (Aug 13): $0.75/$3.75 intro through Dec 31 2026

Gemini 3.6 Pro: Google’s current Pro-class long-context row

Cast Your Matchup Vote

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CompareLLM Matrix

Gemini 1.5 Pro

Gemini 3.7 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Swap or Add Any Model to this Matchup

Interactive Comparison Diagram

Tug-of-War Matchup Matrix

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Multi-Dimensional Capability Radar

Gemini 3.7 Flash

Gemini 3.7 Flash

Gemini 3.7 Flash

Full Benchmark Score Matrix

Workload Cost & Savings Calculator

Key Selection Recommendations

Recommended Workload Routing

Related Editorial Dispatches & Benchmark Notes

Gemini Flash vs Pro: when Flash is the whole product

Gemini 3.6 Flash (Jul 21) now shares the 3.7 intro rate

Gemini 3.7 Flash (Aug 13): $0.75/$3.75 intro through Dec 31 2026

Gemini 3.6 Pro: Google’s current Pro-class long-context row

Cast Your Matchup Vote

Community Discussions (0)

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CompareLLM Matrix

Gemini 1.5 Pro

Gemini 3.7 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons