Pairwise benchmark snapshot · Aug 17, 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/

In this head-to-head showdown, Gemini 3.7 Flash delivers higher overall intelligence and human-preferred responses (Elo 1,530 vs 1,260), while Gemini 3.7 Flash leads in SWE-bench software engineering benchmarks (72.4%), while Gemini 3.7 Flash is more budget-friendly at $1.875/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

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Executive Verdict Summary

Gemini 3.7 Flash holds empirical advantage (8 of 9 metrics)

Coding / SWESWE-bench

Gemini 3.7 FlashTop code solve rate

ReasoningGPQA / Live

Gemini 3.7 FlashTop logical accuracy

Best Value$/1M Tok

Gemini 3.7 FlashLowest API billing cost

Speed / TokTok/Sec

Gemini 3.7 FlashFastest stream rate

Verified Advantage Breakdown

9 benchmarks evaluated across capability, speed, and cost

Gemini 1.5 Pro (1)Gemini 3.7 Flash (8)

Gemini 1.5 Pro

1 of 9 Wins

✓Context window

Gemini 3.7 Flash

8 of 9 Wins

✓Preference Elo✓LiveBench✓SWE-bench✓GPQA Diamond✓Time to first token✓Output speed✓Input price✓Output price

Google

Leads 1 of 9

Gemini 1.5 Pro

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

Elo 1,260In: $1.25 · Out: $5/1M

Google

Leads 8 of 9

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).

3.7 Flash SpeedElo 1,530In: $0.375 · Out: $1.875/1M

Top Rival Showdowns for Gemini 1.5 Pro

All Matchups

Compare vs:vs Claude Opus 4.5 vs GPT-5 vs Grok 4.6 vs DeepSeek V4 Pro vs Qwen 3 Max

Preference LeaderGemini 3.7 Flash Wins

Gemini 3.7 Flash

Δ 270 Arena Elo pts

Throughput LeaderGemini 3.7 Flash Wins

Gemini 3.7 Flash

215 tok/s

Value per Dollar LeaderGemini 3.7 Flash Wins

Gemini 3.7 Flash

$1.875 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top standard models across 6 key capability dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect

0–100 %ile

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

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

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

← Gemini 1.5 ProGemini 3.7 Flash →

🏆Gemini 3.7 Flash Leads(5/5)

Intelligence & Reasoning

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

Benchmark

Gemini 1.5 ProvsGemini 3.7 Flash

Preference Elo

1,260vs1,530+270

Coding Elo

—vs1,546

SWE-bench

38%vs72.4%+34.4%

LiveBench

49.2%vs69.6%+20.4%

GPQA Diamond

58%vs81.2%+23.2%

Gemini 1.5 Pro: 0WGemini 3.7 Flash: 5W

🏆Gemini 3.7 Flash Leads(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark

Gemini 1.5 ProvsGemini 3.7 Flash

Output speed

70 tok/svs215 tok/s+145 tok/s

Time to first token

240 msvs82 ms+158 ms

Gemini 1.5 Pro: 0WGemini 3.7 Flash: 2W

🏆Gemini 3.7 Flash Leads(2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark

Gemini 1.5 ProvsGemini 3.7 Flash

Output price

$5/1Mvs$1.875/1M+$3.125/1M

Input price

$1.25/1Mvs$0.375/1M+$0.875/1M

Context window

2Mvs1M+951k

Gemini 1.5 Pro: 1WGemini 3.7 Flash: 2W

Side-by-Side Benchmark Matrix

Gemini 1.5 ProGemini 3.7 Flash

Preference EloGemini 3.7 Flash +270

Gemini 1.5 Pro1,260

Gemini 3.7 Flash1,530

Coding Elo

Gemini 1.5 Pro—

Gemini 3.7 Flash1,546

LiveBenchGemini 3.7 Flash +20.4%

Gemini 1.5 Pro49.2%

Gemini 3.7 Flash69.6%

SWE-benchGemini 3.7 Flash +34.4%

Gemini 1.5 Pro38%

Gemini 3.7 Flash72.4%

GPQA DiamondGemini 3.7 Flash +23.2%

Gemini 1.5 Pro58%

Gemini 3.7 Flash81.2%

Time to first tokenGemini 3.7 Flash +158 ms

Gemini 1.5 Pro240 ms

Gemini 3.7 Flash82 ms

Output speedGemini 3.7 Flash +145 tok/s

Gemini 1.5 Pro70 tok/s

Gemini 3.7 Flash215 tok/s

Input priceGemini 3.7 Flash +$0.875/1M

Gemini 1.5 Pro$1.25/1M

Gemini 3.7 Flash$0.375/1M

Output priceGemini 3.7 Flash +$3.125/1M

Gemini 1.5 Pro$5/1M

Gemini 3.7 Flash$1.875/1M

Context windowGemini 1.5 Pro +951k

Gemini 1.5 Pro2M

Gemini 3.7 Flash1M

Benchmark	Gemini 1.5 Pro	Gemini 3.7 Flash	Advantage Delta
Preference Elo	1,260 lmarena · Aug 17, 2026	1,530 lmarena · Aug 16, 2026	+270
Coding Elo	—	1,546 lmarena · Aug 16, 2026	—
LiveBench	49.2% livebench · Aug 17, 2026	69.6% livebench · Aug 16, 2026	+20.4%
SWE-bench	38% swebench · Aug 17, 2026	72.4% swebench · Aug 16, 2026	+34.4%
GPQA Diamond	58% seed-bootstrap · Aug 1, 2026	81.2% seed-bootstrap · Aug 16, 2026	+23.2%
Time to first token	240 ms seed-bootstrap · Aug 1, 2026	82 ms seed-bootstrap · Aug 16, 2026	+158 ms
Output speed	70 tok/s seed-bootstrap · Aug 1, 2026	215 tok/s seed-bootstrap · Aug 16, 2026	+145 tok/s
Input price	$1.25/1M seed-bootstrap · Aug 1, 2026	$0.375/1M openrouter · Aug 17, 2026	+$0.875/1M
Output price	$5/1M seed-bootstrap · Aug 1, 2026	$1.875/1M openrouter · Aug 17, 2026	+$3.125/1M
Context window	2M seed-bootstrap · Aug 1, 2026	1M openrouter · Aug 17, 2026	+951k

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save 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

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 ($1.875/1M).

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 ($1.875/1M).
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.

Cast Your Matchup Vote

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK

Google

Gemini 1.5 Pro

Elo 1,260

SWE-bench38%

Speed (tok/s)70 tok/s

Input / 1M Tokens$1.25/1M

Output / 1M Tokens$5/1M

Google

Gemini 3.7 Flash

Elo 1,530

SWE-bench72.4%

Speed (tok/s)215 tok/s

Input / 1M Tokens$0.375/1M

Output / 1M Tokens$1.875/1M

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 $1.875/1M 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

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top standard models across 6 key capability dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect

0–100 %ile

Side-by-Side Benchmark Matrix

Gemini 1.5 ProGemini 3.7 Flash

Preference EloGemini 3.7 Flash +270

Gemini 1.5 Pro1,260

Gemini 3.7 Flash1,530

Coding Elo

Gemini 1.5 Pro—

Gemini 3.7 Flash1,546

LiveBenchGemini 3.7 Flash +20.4%

Gemini 1.5 Pro49.2%

Gemini 3.7 Flash69.6%

SWE-benchGemini 3.7 Flash +34.4%

Gemini 1.5 Pro38%

Gemini 3.7 Flash72.4%

GPQA DiamondGemini 3.7 Flash +23.2%

Gemini 1.5 Pro58%

Gemini 3.7 Flash81.2%

Time to first tokenGemini 3.7 Flash +158 ms

Gemini 1.5 Pro240 ms

Gemini 3.7 Flash82 ms

Output speedGemini 3.7 Flash +145 tok/s

Gemini 1.5 Pro70 tok/s

Gemini 3.7 Flash215 tok/s

Input priceGemini 3.7 Flash +$0.875/1M

Gemini 1.5 Pro$1.25/1M

Gemini 3.7 Flash$0.375/1M

Output priceGemini 3.7 Flash +$3.125/1M

Gemini 1.5 Pro$5/1M

Gemini 3.7 Flash$1.875/1M

Context windowGemini 1.5 Pro +951k

Gemini 1.5 Pro2M

Gemini 3.7 Flash1M

Benchmark

Gemini 1.5 Pro

Gemini 3.7 Flash

Advantage Delta

Preference Elo

1,260

lmarena · Aug 17, 2026

1,530

lmarena · Aug 16, 2026

+270

Coding Elo

—

1,546

lmarena · Aug 16, 2026

—

LiveBench

49.2%

livebench · Aug 17, 2026

69.6%

livebench · Aug 16, 2026

+20.4%

SWE-bench

38%

swebench · Aug 17, 2026

72.4%

swebench · Aug 16, 2026

+34.4%

GPQA Diamond

58%

seed-bootstrap · Aug 1, 2026

81.2%

seed-bootstrap · Aug 16, 2026

+23.2%

Time to first token

240 ms

seed-bootstrap · Aug 1, 2026

82 ms

seed-bootstrap · Aug 16, 2026

+158 ms

Output speed

70 tok/s

seed-bootstrap · Aug 1, 2026

215 tok/s

seed-bootstrap · Aug 16, 2026

+145 tok/s

Input price

$1.25/1M

seed-bootstrap · Aug 1, 2026

$0.375/1M

openrouter · Aug 17, 2026

+$0.875/1M

Output price

$5/1M

seed-bootstrap · Aug 1, 2026

$1.875/1M

openrouter · Aug 17, 2026

+$3.125/1M

Context window

seed-bootstrap · Aug 1, 2026

openrouter · Aug 17, 2026

+951k

Recommended Workload Routing

Repo / coding agentsGemini 3.7 Flash

Higher SWE-bench (72.4%).

High-volume chatGemini 3.7 Flash

Lower output list price ($1.875/1M).

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 ($1.875/1M).
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 $1.875/1M 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.

Gemini 3.7 Flash holds empirical advantage (8 of 9 metrics)

Verified Advantage Breakdown

Gemini 3.7 Flash

Gemini 3.7 Flash

Gemini 3.7 Flash

Capability Percentiles

Leaders Matchup Capability Radar

Overall Matchup Breakdown

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Side-by-Side Benchmark 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)

Social Share Card Preview

CompareLLM AI Matrix

Gemini 1.5 Pro

Gemini 3.7 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons

Gemini 3.7 Flash holds empirical advantage (8 of 9 metrics)

Verified Advantage Breakdown

Gemini 3.7 Flash

Gemini 3.7 Flash

Gemini 3.7 Flash

Capability Percentiles

Leaders Matchup Capability Radar

Overall Matchup Breakdown

Intelligence & Reasoning

Speed & Latency

Pricing & Capacity

Side-by-Side Benchmark 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)

Social Share Card Preview

CompareLLM AI Matrix

Gemini 1.5 Pro

Gemini 3.7 Flash

Frequently Asked Questions

Related news

Similar Head-to-Head Comparisons