LocalFit

Step 5 Preview

stepfun-ai/Step-5-Preview

Released2026-10 (day unknown)Size600B · 27B activeLicenseotherAA rank#3 of 75

Files and memory at 8K context

No verified quantized file for the requested formats.

No verified file: Q4_K_M, Q5_K_M, Q8_0, FP16, BF16, MLX 4-bit, MLX 8-bit. Sizes are exact file bytes (text weights; projectors listed separately). “+” = recurrent state or other terms unknown. Smallest fit adds 0.5 GiB spare; Macs use 75% of memory.

Quality

Artificial Analysis Intelligence Index

43.7

Variant: Step 5 Preview · observed 2026-10-17 · source

Rank #3 of 75 researched 2026 models.

Arena text rating

1,441

95% CI 1434–1449 · 7,116 votes · published 2026-10-15 · dataset

Hosted comparator only; Arena still labels this entry proprietary. Do not attribute its rating to the open checkpoint.

Scores describe the evaluated hosted variant, not each quantized file. AA and Arena are never averaged.

Reported speeds 0

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