BenchmarksStepFunToday
Step 5 Preview Benchmark Update
Quality: 43.7/100 | Price: $1.425/M tokens | Output: 218.566 tok/s | HumanEval: 0.589%
View sourceStepfun
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters). It performs strongly in software engineering and professional...
Step 5 Preview is StepFun's flagship model for agentic work, built on a sparse Mixture-of-Experts architecture (27B active / 600B total parameters).
OpenRouter
Price record: 2026-10-25. Source: openrouter.
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Quality Score
1250
Arena ELO
600B
Parameters
1M
Context
This measures the amount of verifiable public evidence we have, not how capable the model is. A missing field means it has not been verified yet, not that its value is zero.
15 of 22 public signals
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Oct 2026
Released
4/5 signals
3/4 signals
3/5 signals
1/4 signals
4/4 signals
Parameters
600B
Training compute
Not reported
Dataset scale
Not reported
Base model
Not reported
Source-reported access: API access · Likely confidence
Gaps we are still tracking
Benchmarks
20
Recent launch, pricing, benchmark, and API signals linked to this model or its provider.
Quality: 43.7/100 | Price: $1.425/M tokens | Output: 218.566 tok/s | HumanEval: 0.589%
View sourceQuality: 43.7/100 | Price: $1.425/M tokens | Output: 222.613 tok/s | HumanEval: 0.589%
View sourceQuality: 43.7/100 | Price: $1.425/M tokens | Output: 216.856 tok/s | HumanEval: 0.589%
View sourceQuality: 43.7/100 | Price: $1.425/M tokens | Output: 102.553 tok/s | HumanEval: 0.589%
View sourceQuality: 43.7/100 | Price: $1.425/M tokens | Output: 92.243 tok/s | HumanEval: 0.589%
View sourceQuality: 43.7/100 | Price: $1.425/M tokens | Output: 218.566 tok/s | HumanEval: 0.589%
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c
Quality: 43.7/100 | Price: $1.425/M tokens | Output: 222.613 tok/s | HumanEval: 0.589%
Quality: 43.7/100 | Price: $1.425/M tokens | Output: 216.856 tok/s | HumanEval: 0.589%
Quality: 43.7/100 | Price: $1.425/M tokens | Output: 102.553 tok/s | HumanEval: 0.589%
Quality: 43.7/100 | Price: $1.425/M tokens | Output: 92.243 tok/s | HumanEval: 0.589%
Quality: 43.7/100 | Price: $1.425/M tokens | Output: 86.483 tok/s | HumanEval: 0.589%
Quality: 43.7/100 | Price: $1.425/M tokens | Output: 86.48 tok/s | HumanEval: 0.589%
Quality: 43.7/100 | Price: $1.425/M tokens | Output: 87.91 tok/s | HumanEval: 0.589%
Quality: 43.7/100 | Price: $1.425/M tokens | Output: 87.992 tok/s | HumanEval: 0.589%
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c
Black-forest-labs Downloadable flux-3-image-klein FLUX 3 Image Klein is a state-of-the-art open-weight image generation and editing model NVIDIA Free Endpoint nemotron-3.5-super-vl-120b-a12b Nemotron 3.5 Super early-access reasoning model for agentic, coding, tool-calling, and multimodal workloads Stepfun-ai Free Endpoint Step 5 Preview Preview of StepFun's Step 5: ~600B-total / 27B-active multimodal MoE (text and image in, text out) with 1M context, reasoning and tool c