Pairwise benchmark snapshot · Aug 1, 2026noindex (thin pair)

Claude 3.5 Sonnet vs FLUX.1.1 [pro] benchmark

Name: Claude 3.5 Sonnet vs FLUX.1.1 [pro] AI benchmark comparison
Creator: CompareLLM
License: https://creativecommons.org/licenses/by/4.0/

Comparing verified benchmark accuracy, speed, and token pricing between Claude 3.5 Sonnet and FLUX.1.1 [pro]. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Share Analysis:

Anthropic

Claude 3.5 Sonnet

2024 workhorse. Still a high-intent compare against GPT-4o.

Img Elo 1,280

Black Forest Labs

FLUX.1.1 [pro]

First-generation professional API model from Black Forest Labs, renowned for 6x faster generation than original FLUX.1 Pro.

Img Elo 1,210$50/1k imgs

Top Rival Showdowns for Claude 3.5 Sonnet

All Matchups

Compare vs:vs GPT Image 2 (High)vs Reve 2.1 vs Nano Banana Pro (Gemini 3 Pro Image)vs FLUX.2 [max]vs Ideogram 4.0 (Quality)

Image Quality Leader

No shared data

Single model data

Generation Speed Leader

No shared data

No latency data

Value per Dollar Leader

No shared data

Unpriced

Head-to-Head Comparison

Overall Matchup Breakdown

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

Claude 3.5 Sonnet (0)vsFLUX.1.1 [pro] (5)

Claude 3.5 Sonnet: 0W (0%)Overall: FLUX.1.1 [pro]FLUX.1.1 [pro]: 5W (100%)

← Claude 3.5 SonnetFLUX.1.1 [pro] →

🏆FLUX.1.1 [pro](3/3)

Visual Quality & Adherence

Arena Preference Elo, prompt fidelity & typography score

Benchmark

Claude 3.5 SonnetvsFLUX.1.1 [pro]

Image Elo

—vs1,210

Prompt adherence

—vs89%

Text rendering

—vs89.5%

Claude 3.5 Sonnet: 0WFLUX.1.1 [pro]: 3W

🏆FLUX.1.1 [pro](1/1)

Generation Latency

Time to render full-resolution image snapshot (seconds)

Benchmark

Claude 3.5 SonnetvsFLUX.1.1 [pro]

Generation time

—vs3.2s

Claude 3.5 Sonnet: 0WFLUX.1.1 [pro]: 1W

🏆FLUX.1.1 [pro](1/1)

Cost Efficiency

API inference cost per 1,000 generated images

Benchmark

Claude 3.5 SonnetvsFLUX.1.1 [pro]

Price per 1k images

—vs$50/1k

Claude 3.5 Sonnet: 0WFLUX.1.1 [pro]: 1W

Side-by-Side Benchmark Matrix

Image Elo

Claude 3.5 Sonnet—

FLUX.1.1 [pro]1,210

seed-bootstrap · Aug 1, 2026

Generation time

Claude 3.5 Sonnet—

FLUX.1.1 [pro]3.2s

seed-bootstrap · Aug 1, 2026

Price per 1k images

Claude 3.5 Sonnet—

FLUX.1.1 [pro]$50/1k

seed-bootstrap · Aug 1, 2026

Prompt adherence

Claude 3.5 Sonnet—

FLUX.1.1 [pro]89%

seed-bootstrap · Aug 1, 2026

Text rendering

Claude 3.5 Sonnet—

FLUX.1.1 [pro]89.5%

seed-bootstrap · Aug 1, 2026

Benchmark	Claude 3.5 Sonnet	FLUX.1.1 [pro]	Advantage Delta
Image Elo	—	1,210 seed-bootstrap · Aug 1, 2026	—
Generation time	—	3.2s seed-bootstrap · Aug 1, 2026	—
Price per 1k images	—	$50/1k seed-bootstrap · Aug 1, 2026	—
Prompt adherence	—	89% seed-bootstrap · Aug 1, 2026	—
Text rendering	—	89.5% seed-bootstrap · Aug 1, 2026	—

Interactive Simulator (USD)

Workload Cost & Savings Calculator

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

Save up to 100% with Claude 3.5 Sonnet

Monthly Image Production Volume25k images / month (25000 imgs)

Quick Presets:

Claude 3.5 Sonnet$0.00 / mo

Rate: $0/1k

FLUX.1.1 [pro]$1,250.00 / mo

Rate: $50/1k

Estimated Cost Delta

Claude 3.5 Sonnet is estimated to save $1,250.00/month ($15,000/year).

Based on 25k images generated

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatinsufficient data

Need list prices.

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGinsufficient data

Need context sizes.

Screenshots / visioninsufficient data

Both accept images. Defaulting to the higher-Elo side (undefined).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	insufficient data	Need list prices.
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	insufficient data	Need context sizes.
Screenshots / vision	insufficient data	Both accept images. Defaulting to the higher-Elo side (undefined).

Community Sentiment

Cast Your Matchup Vote

0 total votes

Community Discussions (0)

No comments posted on this matchup yet. Be the first to share an evaluation note!

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK

Anthropic

Claude 3.5 Sonnet

Elo 1,280

SWE-bench49%

Speed (tok/s)80 tok/s

Input / 1M Tokens$3/1M

Output / 1M Tokens$15/1M

Black Forest Labs

FLUX.1.1 [pro]

Elo n/a

SWE-bench—

Speed (tok/s)—

Input / 1M Tokens$50/1k

Output / 1M Tokens$50/1k

Frequently Asked Questions

Which is better overall, Claude 3.5 Sonnet or FLUX.1.1 [pro]?: We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, Claude 3.5 Sonnet or FLUX.1.1 [pro]?: SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?: List prices are missing for at least one model.
Which is faster, Claude 3.5 Sonnet or FLUX.1.1 [pro]?: We do not have TTFT for both models.
Which has the larger context window?: Context window is missing for at least one model.
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. Claude 3.5 Sonnet and FLUX.1.1 [pro] Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All Claude 3.5 Sonnet matchups →|All FLUX.1.1 [pro] matchups →

Claude 3.5 Sonnet vs Claude 3.7 Sonnet (next sonnet)FLUX.1.1 [pro] vs FLUX.1 [schnell] (previous flux)FLUX.1.1 [pro] vs FLUX.2 [flex] (next flux)Claude Opus 4.5 vs Claude 3.5 Sonnet Claude Opus 4.6 vs Claude 3.5 Sonnet Claude Sonnet 4.5 vs Claude 3.5 Sonnet

Side-by-Side Benchmark Matrix

Image Elo

Claude 3.5 Sonnet—

FLUX.1.1 [pro]1,210

seed-bootstrap · Aug 1, 2026

Generation time

Claude 3.5 Sonnet—

FLUX.1.1 [pro]3.2s

seed-bootstrap · Aug 1, 2026

Price per 1k images

Claude 3.5 Sonnet—

FLUX.1.1 [pro]$50/1k

seed-bootstrap · Aug 1, 2026

Prompt adherence

Claude 3.5 Sonnet—

FLUX.1.1 [pro]89%

seed-bootstrap · Aug 1, 2026

Text rendering

Claude 3.5 Sonnet—

FLUX.1.1 [pro]89.5%

seed-bootstrap · Aug 1, 2026

Benchmark

Claude 3.5 Sonnet

FLUX.1.1 [pro]

Advantage Delta

Image Elo

—

1,210

seed-bootstrap · Aug 1, 2026

—

Generation time

—

3.2s

seed-bootstrap · Aug 1, 2026

—

Price per 1k images

—

$50/1k

seed-bootstrap · Aug 1, 2026

—

Prompt adherence

—

89%

seed-bootstrap · Aug 1, 2026

—

Text rendering

—

89.5%

seed-bootstrap · Aug 1, 2026

—

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatinsufficient data

Need list prices.

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGinsufficient data

Need context sizes.

Screenshots / visioninsufficient data

Both accept images. Defaulting to the higher-Elo side (undefined).

Target Workload	Recommended Pick	Evaluation Rationale
Repo / coding agents	insufficient data	Need SWE-bench on both sides.
High-volume chat	insufficient data	Need list prices.
Voice / low-latency UI	insufficient data	Need TTFT on both sides.
Long-document RAG	insufficient data	Need context sizes.
Screenshots / vision	insufficient data	Both accept images. Defaulting to the higher-Elo side (undefined).

Frequently Asked Questions

Which is better overall, Claude 3.5 Sonnet or FLUX.1.1 [pro]?

We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.

Which is better at coding, Claude 3.5 Sonnet or FLUX.1.1 [pro]?

SWE-bench is missing for at least one model, so we do not rank coding from a single number.

Which is cheaper to run in production?

List prices are missing for at least one model.

Which is faster, Claude 3.5 Sonnet or FLUX.1.1 [pro]?

We do not have TTFT for both models.

Which has the larger context window?

Context window is missing for at least one model.

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. Claude 3.5 Sonnet and FLUX.1.1 [pro] Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.