Sana-Sprint 0.6B 1024pxvs.Chroma1-Flash

Which one is better?

In our own test both are on par. Neither is in the arena. Neither has an API price.

Test images

Same task, the first image of each. The task with the biggest difference is preselected.

Sana-Sprint 0.6B 1024px: Character and detail, first image from the fixed test run — Sana-Sprint 0.6B 1024px9 out of 100

Chroma1-Flash: Character and detail, first image from the fixed test run — Chroma1-Flash51 out of 100

Result for “Character and detail”:Chroma1-Flash ahead

Prompt given to both modelsCreate a square cinematic full-body portrait of a fictional bicycle courier waiting under a transparent umbrella at a rainy tram stop in Hamburg at blue hour. She wears a mustard raincoat, navy trousers, red sneakers, a silver helmet, and carries a teal messenger bag. Keep both hands visible, render the bicycle correctly, use realistic wet-street reflections, and include no readable brand names.

What the rating looks at: Anatomy, clothing, and spatial consistency.

“Ahead”: better in all three rating rounds. “Slightly ahead”: a higher value, but not in every round.

Test protocol of the images

Each test attempt uses the same archived prompt and one request. The first output of that attempt counts. Repeats after technical test failures are disclosed for the affected images. Files are normalized to 1,024 × 1,024 pixels without cropping. Provider resolution, randomness, quality tier and prompt processing can still differ. The images are a practical visual test, not a reconstruction of the arena configuration.

Character and detail

Sana-Sprint 0.6B 1024px: manual, 1:1, one request, first output, one image, provider-side randomize seed enabled, observed seed 1646387073, native 1024x1024, 2 inference steps, guidance 4.5, no prompt enhancement, no reference images, exact checkpoint Efficient-Large-Model/Sana_Sprint_0.6B_1024px_diffusers, Space commit b42328123ed688df4bee46e52c60cc1dc62c045a, generated Nov 1, 2026, 9:42 PM. Source

Chroma1-Flash: manual, local PyTorch 2.13.0, Diffusers 0.36.0; lodestones/Chroma1-Flash@093c4f63b60507234aa53a073f1f9f565b3f4336; native 1024x1024, 1:1; one request, first output; steps=16, guidance=1.0, seed=1817192317085624771; mps for text encoder and denoising; cpu for native VAE decode; bfloat16 for text encoder and transformer; float32 for VAE, generated Nov 2, 2026, 8:25 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: 985a75b38642a9f0e5e0c0e0c67f1b7f67780d42bd2168fa24e9a7a7a94b0da6

Sana-Sprint 0.6B 1024px image SHA 256: 17356f29ad7fa9644e9683ec624d0c01ad56ff0c14d078db5f78f3b6bcf6a45e

Chroma1-Flash image SHA 256: e05e2caf9373cf90bfd96b30150729d99a9f58104437e9c38ea0543607b41190

Infographic

Sana-Sprint 0.6B 1024px: manual, 1:1, one request, first output, one image, provider-side randomize seed enabled, observed seed 1798448399, native 1024x1024, 2 inference steps, guidance 4.5, no prompt enhancement, no reference images, exact checkpoint Efficient-Large-Model/Sana_Sprint_0.6B_1024px_diffusers, Space commit b42328123ed688df4bee46e52c60cc1dc62c045a, generated Nov 1, 2026, 9:42 PM. Source

Chroma1-Flash: manual, local PyTorch 2.13.0, Diffusers 0.36.0; lodestones/Chroma1-Flash@093c4f63b60507234aa53a073f1f9f565b3f4336; native 1024x1024, 1:1; one request, first output; steps=16, guidance=1.0, seed=14241408974679486; mps for text encoder and denoising; cpu for native VAE decode; bfloat16 for text encoder and transformer; float32 for VAE, generated Nov 2, 2026, 8:27 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: ed65cb4e6a51e2336f8b149ad4cbb16e020f07d527ad94362e719d2dcf91d94f

Sana-Sprint 0.6B 1024px image SHA 256: efbab43ef1980109bff4084afe6162c4915e4fb55185617adaac5713f20b5e24

Chroma1-Flash image SHA 256: cf0f2160309bfc4bd6c00df8383d963af3fb1860cfa7509c6466f37afcb2bbc2

Product photography

Sana-Sprint 0.6B 1024px: manual, 1:1, one request, first output, one image, provider-side randomize seed enabled, observed seed 520567323, native 1024x1024, 2 inference steps, guidance 4.5, no prompt enhancement, no reference images, exact checkpoint Efficient-Large-Model/Sana_Sprint_0.6B_1024px_diffusers, Space commit b42328123ed688df4bee46e52c60cc1dc62c045a, generated Nov 1, 2026, 9:42 PM. Source

Chroma1-Flash: manual, local PyTorch 2.13.0, Diffusers 0.36.0; lodestones/Chroma1-Flash@093c4f63b60507234aa53a073f1f9f565b3f4336; native 1024x1024, 1:1; one request, first output; steps=16, guidance=1.0, seed=4601939984165617850; mps for text encoder and denoising; cpu for native VAE decode; bfloat16 for text encoder and transformer; float32 for VAE, generated Nov 2, 2026, 8:24 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: c67fd71e91304458a2feef5c91efa8677260fab0c0099a29a2c52cb579f5b2f3

Sana-Sprint 0.6B 1024px image SHA 256: ac2d880a5b40924b518e25c61c5e077ffc9c5825f3eb896d733096ac6c631e46

Chroma1-Flash image SHA 256: 0c622731fd94810154ca50f7373f372c21911602c20b7cfd57451a77eb9fbbf0

Typography and layout

Sana-Sprint 0.6B 1024px: manual, 1:1, one request, first output, one image, provider-side randomize seed enabled, observed seed 1229099615, native 1024x1024, 2 inference steps, guidance 4.5, no prompt enhancement, no reference images, exact checkpoint Efficient-Large-Model/Sana_Sprint_0.6B_1024px_diffusers, Space commit b42328123ed688df4bee46e52c60cc1dc62c045a, generated Nov 1, 2026, 9:42 PM. Source

Chroma1-Flash: manual, local PyTorch 2.13.0, Diffusers 0.36.0; lodestones/Chroma1-Flash@093c4f63b60507234aa53a073f1f9f565b3f4336; native 1024x1024, 1:1; one request, first output; steps=16, guidance=1.0, seed=5666015459258575499; mps for text encoder and denoising; cpu for native VAE decode; bfloat16 for text encoder and transformer; float32 for VAE, generated Nov 2, 2026, 8:23 PM. Source

Protocol gradually-image-comparison-v1. Prompt SHA 256: 2e012c3d14ee5dd02203a94f394ca80a5038cdebd6032b25a8b8a221f2255419

Sana-Sprint 0.6B 1024px image SHA 256: fd10095819c7746d6b52cc50e3d63f9d81eff271ad1edb4d3ba667a954098ac7

Chroma1-Flash image SHA 256: 9729caf8c40b655d4fb8b8a9fc2437c099dce846a6a8367d79809dd8e08cfea9

The numbers at a glance

Arena ratingfrom votes by users · higher is better

n/a

Sana-Sprint 0.6B 1024px

not in the arena

n/a

Chroma1-Flash

not in the arena

GraduallyBenchour own rating, 0 to 100 · higher is better

Sana-Sprint 0.6B 1024px

Rank 101 of 108

Chroma1-Flash

Rank 92 of 108

Price per imagedollars through the API · lower is better

n/a

Sana-Sprint 0.6B 1024px

no API price

n/a

Chroma1-Flash

no API price

Ranks among the 21 image models with an arena rating and the 108 with a GraduallyBench run; prices compared with 28 models with an API price.

Sana-Sprint 0.6B 1024px

Subscription: n/a No plan in Germany names exactly this model.
Via API: No API price known. Access: local.
License: Open weights.

Chroma1-Flash

Subscription: n/a No plan in Germany names exactly this model.
Via API: No API price known. Access: local.
License: Open weights.

Subscriptions only count plans that name exactly this model. Subscription prices include VAT, API prices are in dollars.

GraduallyBench from Nov 3, 2026 · Subscription database from Sep 29, 2026 (38 days old)

All data side by side

The better value is bold. For ratings only when the gap is clear.

Kennzahl	Sana-Sprint 0.6B 1024px	Chroma1-Flash
Ratings
Arena ratingfrom votes by users, higher is better	n/a	n/a
Arena rank	n/a	n/a
Arena votesmore votes, a safer rating	n/a	n/a
GraduallyBenchour own rating, 0 to 100	13	24
GraduallyBench by task
Typography and layoutLegible text, hierarchy, and composition	16	16
Product photographyMaterials, reflections, and fine details	19	16
Character and detailAnatomy, clothing, and spatial consistency	9	51
InfographicNumbers, labels, and visual organization	7	12
API price
Per imagelower is better	n/a	n/a
100 images	n/a	n/a
Profile
Released	Mar 22, 2025	n/a
Weightsopen means: runs locally	open	open
Access	local	local
Parameters	0.6 billion	8.9 billion
Largest output	not consistently published	not consistently published
Plans in Germanynaming exactly this model	n/a	n/a

API prices for one image at 1,024 × 1,024 pixels according to Artificial Analysis.

Sources: Sana-Sprint 0.6B 1024px model source (verified Nov 1, 2026) · Chroma1-Flash model source (verified Nov 1, 2026)

Arena ratings by category

From blind votes on LMArena. “Ahead” means the lead is clear.

No shared arena score in the stored snapshot

The stored benchmark database contains no measurement for Sana-Sprint 0.6B 1024px and Chroma1-Flash from the same arena and category. Older model versions are not used as substitutes.

More comparisons

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