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Creator unverified · current

Step 3.5 Flash 2603

Step 3.5 Flash 2603 is listed with its creator unverified. It accepts text input and produces text output. Reported capabilities include reasoning and tool calling.

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Report an errorModel and price history

Modalities

Hosted provider token rates

$0.10 / $0.30

USD per 1M input / output tokens · EmpirioLabs AI

Context

262K

Released

2026-04-02

Knowledge cutoff

Jan 2025

No recent lab-operated provider rate is available. Showing the third-party host with the lowest input rate + ¼ output rate. This is one offering, not an average; other providers, modalities, tiers, and fees may differ.

Where to use it

6 observed offerings · token prices in USD per million where available

Estimate your workload cost
EmpirioLabs AI

step-3-5-flash-2603

current

Input

$0.10

Output

$0.30

Cache

$0.02

Context

262K

Max output

131K
Reasoning
Yes
Tool calling
Yes
Structured output
No
Temperature
Yes

Recent price

NanoGPT

stepfun-ai/step-3.5-flash-2603

current

Input

$0.10

Output

$0.30

Cache

$0.05

Context

262K

Max output

66K
Reasoning
Yes
Tool calling
No
Structured output
No
Temperature
Yes

Recent price

StepFun (Global)

step-3.5-flash-2603

current

Input

$0.10

Output

$0.30

Cache

$0.02

Context

256K

Max output

256K
Reasoning
Yes
Tool calling
Yes
Structured output
Yes
Temperature
Yes

Recent price

StepFun Step Plan (Global)

step-3.5-flash-2603

current

Input

—

Output

—

Cache

—

Context

256K

Max output

256K
Reasoning
Yes
Tool calling
Yes
Structured output
Unknown
Temperature
Yes

Billing scope requires review

StepFun (China)

step-3.5-flash-2603

current

Input

$0.1046

Output

$0.3138

Cache

$0.0209

Context

256K

Max output

256K
Reasoning
Yes
Tool calling
Yes
Structured output
Yes
Temperature
Yes

Recent price

StepFun Step Plan (China)

step-3.5-flash-2603

current

Input

—

Output

—

Cache

—

Context

256K

Max output

256K
Reasoning
Yes
Tool calling
Yes
Structured output
Yes
Temperature
Yes

Billing scope requires review

Limits and capabilities reflect each provider’s listed offering. Unknown means support was not reported.

Capabilities and limits

Input
text
Output
text
Max output
131K
Weights
Open (source-reported)
Release
2026-04-02
Knowledge cutoff
Jan 2025
Family
step

Reasoning · Tool calling

Provider-specific limits and support can differ.

Plan a model evaluation

Evaluate quality and latency on examples from your intended use before choosing a model.

Explore available evidence

Models to compare

Candidates match reported specifications; they are not tested replacements.

Step 5 PreviewNVIDIA · 1.05M contextCompare →Qwen3.8 Flash NextAlibaba · 262K contextCompare →Beam 1.0 501B A23BCreator unverified · 262K contextCompare →

Model and price history

Latest recorded change: source refresh · 2026-10-31

Model changes (12)
  • source refresh · 2026-10-31
    {
  "before": {
    "context_tokens": 256000
  },
  "after": {
    "context_tokens": 262144
  }
}
  • source refresh · 2026-10-21
    {
  "before": {
    "supports_structured_output": true
  },
  "after": {
    "supports_structured_output": false
  }
}
  • source refresh · 2026-10-21
    {
  "before": {
    "supports_structured_output": false
  },
  "after": {
    "supports_structured_output": true
  }
}
  • price change · 2026-10-21
    {
  "before": {
    "input": "0.10000000",
    "output": "0.30000000",
    "provider": "StepFun (China)"
  },
  "after": {
    "input": 0.10461,
    "output": 0.31384,
    "provider": "StepFun (China)"
  }
}
  • source refresh · 2026-10-21
    {
  "before": {
    "supports_structured_output": false
  },
  "after": {
    "supports_structured_output": true
  }
}
  • source refresh · 2026-10-21
    {
  "before": {
    "supports_structured_output": false
  },
  "after": {
    "supports_structured_output": true
  }
}
  • source refresh · 2026-10-12
    {
  "before": {
    "knowledge_cutoff_reported": null
  },
  "after": {
    "knowledge_cutoff_reported": "2025-01"
  }
}
  • source refresh · 2026-10-12
    {
  "before": {
    "knowledge_cutoff_reported": null
  },
  "after": {
    "knowledge_cutoff_reported": "2025-01"
  }
}
  • source refresh · 2026-10-12
    {
  "before": {
    "knowledge_cutoff_reported": null
  },
  "after": {
    "knowledge_cutoff_reported": "2025-01"
  }
}
  • source refresh · 2026-10-12
    {
  "before": {
    "knowledge_cutoff_reported": null
  },
  "after": {
    "knowledge_cutoff_reported": "2025-01"
  }
}
  • source refresh · 2026-10-12
    {
  "before": {
    "knowledge_cutoff_reported": null
  },
  "after": {
    "knowledge_cutoff_reported": "2025-01"
  }
}
  • source refresh · 2026-10-12
    {
  "before": {
    "knowledge_cutoff_reported": null
  },
  "after": {
    "knowledge_cutoff_reported": "2025-01"
  }
}
Price history (156 observations)
DateProviderInput / output
2026-11-01EmpirioLabs AI$0.10 / $0.30
2026-11-01NanoGPT$0.10 / $0.30
2026-11-01StepFun (Global)$0.10 / $0.30
2026-11-01StepFun (China)$0.1046 / $0.3138
2026-10-31EmpirioLabs AI$0.10 / $0.30
2026-10-31NanoGPT$0.10 / $0.30
2026-10-31StepFun (Global)$0.10 / $0.30
2026-10-31StepFun (China)$0.1046 / $0.3138
2026-10-30EmpirioLabs AI$0.10 / $0.30
2026-10-30NanoGPT$0.10 / $0.30
2026-10-30StepFun (Global)$0.10 / $0.30
2026-10-30StepFun (China)$0.1046 / $0.3138
2026-10-29EmpirioLabs AI$0.10 / $0.30
2026-10-29NanoGPT$0.10 / $0.30
2026-10-29StepFun (Global)$0.10 / $0.30
2026-10-29StepFun (China)$0.1046 / $0.3138
2026-10-28EmpirioLabs AI$0.10 / $0.30
2026-10-28NanoGPT$0.10 / $0.30
2026-10-28StepFun (Global)$0.10 / $0.30
2026-10-28StepFun (China)$0.1046 / $0.3138
2026-10-27EmpirioLabs AI$0.10 / $0.30
2026-10-27NanoGPT$0.10 / $0.30
2026-10-27StepFun (Global)$0.10 / $0.30
2026-10-27StepFun (China)$0.1046 / $0.3138
2026-10-27EmpirioLabs AI$0.10 / $0.30
2026-10-27NanoGPT$0.10 / $0.30
2026-10-27StepFun (Global)$0.10 / $0.30
2026-10-27StepFun (China)$0.1046 / $0.3138
2026-10-27EmpirioLabs AI$0.10 / $0.30
2026-10-27NanoGPT$0.10 / $0.30
2026-10-27StepFun (Global)$0.10 / $0.30
2026-10-27StepFun (China)$0.1046 / $0.3138
2026-10-27EmpirioLabs AI$0.10 / $0.30
2026-10-27NanoGPT$0.10 / $0.30
2026-10-27StepFun (Global)$0.10 / $0.30
2026-10-27StepFun (China)$0.1046 / $0.3138
2026-10-26EmpirioLabs AI$0.10 / $0.30
2026-10-26NanoGPT$0.10 / $0.30
2026-10-26StepFun (Global)$0.10 / $0.30
2026-10-26StepFun (China)$0.1046 / $0.3138
2026-10-25EmpirioLabs AI$0.10 / $0.30
2026-10-25NanoGPT$0.10 / $0.30
2026-10-25StepFun (Global)$0.10 / $0.30
2026-10-25StepFun (China)$0.1046 / $0.3138
2026-10-24EmpirioLabs AI$0.10 / $0.30
2026-10-24NanoGPT$0.10 / $0.30
2026-10-24StepFun (Global)$0.10 / $0.30
2026-10-24StepFun (China)$0.1046 / $0.3138
2026-10-24EmpirioLabs AI$0.10 / $0.30
2026-10-24NanoGPT$0.10 / $0.30
2026-10-24StepFun (Global)$0.10 / $0.30
2026-10-24StepFun (China)$0.1046 / $0.3138
2026-10-24EmpirioLabs AI$0.10 / $0.30
2026-10-24NanoGPT$0.10 / $0.30
2026-10-24StepFun (Global)$0.10 / $0.30
2026-10-24StepFun (China)$0.1046 / $0.3138
2026-10-23EmpirioLabs AI$0.10 / $0.30
2026-10-23NanoGPT$0.10 / $0.30
2026-10-23StepFun (Global)$0.10 / $0.30
2026-10-23StepFun (China)$0.1046 / $0.3138
2026-10-23EmpirioLabs AI$0.10 / $0.30
2026-10-23NanoGPT$0.10 / $0.30
2026-10-23StepFun (Global)$0.10 / $0.30
2026-10-23StepFun (China)$0.1046 / $0.3138
2026-10-23EmpirioLabs AI$0.10 / $0.30
2026-10-23NanoGPT$0.10 / $0.30
2026-10-23StepFun (Global)$0.10 / $0.30
2026-10-23StepFun (China)$0.1046 / $0.3138
2026-10-23EmpirioLabs AI$0.10 / $0.30
2026-10-23NanoGPT$0.10 / $0.30
2026-10-23StepFun (Global)$0.10 / $0.30
2026-10-23StepFun (China)$0.1046 / $0.3138
2026-10-23EmpirioLabs AI$0.10 / $0.30
2026-10-23NanoGPT$0.10 / $0.30
2026-10-23StepFun (Global)$0.10 / $0.30
2026-10-23StepFun (China)$0.1046 / $0.3138
2026-10-22EmpirioLabs AI$0.10 / $0.30
2026-10-22NanoGPT$0.10 / $0.30
2026-10-22StepFun (Global)$0.10 / $0.30
2026-10-22StepFun (China)$0.1046 / $0.3138
2026-10-21EmpirioLabs AI$0.10 / $0.30
2026-10-21NanoGPT$0.10 / $0.30
2026-10-21StepFun (Global)$0.10 / $0.30
2026-10-21StepFun (China)$0.1046 / $0.3138
2026-10-20EmpirioLabs AI$0.10 / $0.30
2026-10-20NanoGPT$0.10 / $0.30
2026-10-20StepFun (Global)$0.10 / $0.30
2026-10-20StepFun (China)$0.10 / $0.30
2026-10-19EmpirioLabs AI$0.10 / $0.30
2026-10-19NanoGPT$0.10 / $0.30
2026-10-19StepFun (Global)$0.10 / $0.30
2026-10-19StepFun (China)$0.10 / $0.30
2026-10-18EmpirioLabs AI$0.10 / $0.30
2026-10-18NanoGPT$0.10 / $0.30
2026-10-18StepFun (Global)$0.10 / $0.30
2026-10-18StepFun (China)$0.10 / $0.30
2026-10-17EmpirioLabs AI$0.10 / $0.30
2026-10-17NanoGPT$0.10 / $0.30
2026-10-17StepFun (Global)$0.10 / $0.30
2026-10-17StepFun (China)$0.10 / $0.30
2026-10-12EmpirioLabs AI$0.10 / $0.30
2026-10-12NanoGPT$0.10 / $0.30
2026-10-12StepFun (Global)$0.10 / $0.30
2026-10-12StepFun (China)$0.10 / $0.30
2026-10-12EmpirioLabs AI$0.10 / $0.30
2026-10-12NanoGPT$0.10 / $0.30
2026-10-12StepFun (Global)$0.10 / $0.30
2026-10-12StepFun (China)$0.10 / $0.30
2026-10-11EmpirioLabs AI$0.10 / $0.30
2026-10-11NanoGPT$0.10 / $0.30
2026-10-11StepFun (Global)$0.10 / $0.30
2026-10-11StepFun (China)$0.10 / $0.30
2026-10-10EmpirioLabs AI$0.10 / $0.30
2026-10-10NanoGPT$0.10 / $0.30
2026-10-10StepFun (Global)$0.10 / $0.30
2026-10-10StepFun (China)$0.10 / $0.30
2026-10-09EmpirioLabs AI$0.10 / $0.30
2026-10-09NanoGPT$0.10 / $0.30
2026-10-09StepFun (Global)$0.10 / $0.30
2026-10-09StepFun (China)$0.10 / $0.30
2026-10-09EmpirioLabs AI$0.10 / $0.30
2026-10-09NanoGPT$0.10 / $0.30
2026-10-09StepFun (Global)$0.10 / $0.30
2026-10-09StepFun (China)$0.10 / $0.30
2026-10-08EmpirioLabs AI$0.10 / $0.30
2026-10-08NanoGPT$0.10 / $0.30
2026-10-08StepFun (Global)$0.10 / $0.30
2026-10-08StepFun (China)$0.10 / $0.30
2026-10-07EmpirioLabs AI$0.10 / $0.30
2026-10-07NanoGPT$0.10 / $0.30
2026-10-07StepFun (Global)$0.10 / $0.30
2026-10-07StepFun (China)$0.10 / $0.30
2026-09-22EmpirioLabs AI$0.10 / $0.30
2026-09-22NanoGPT$0.10 / $0.30
2026-09-22StepFun (Global)$0.10 / $0.30
2026-09-22StepFun (China)$0.10 / $0.30
2026-09-21EmpirioLabs AI$0.10 / $0.30
2026-09-21NanoGPT$0.10 / $0.30
2026-09-21StepFun (Global)$0.10 / $0.30
2026-09-21StepFun (China)$0.10 / $0.30
2026-09-20EmpirioLabs AI$0.10 / $0.30
2026-09-20NanoGPT$0.10 / $0.30
2026-09-20StepFun (Global)$0.10 / $0.30
2026-09-20StepFun (China)$0.10 / $0.30
2026-09-19EmpirioLabs AI$0.10 / $0.30
2026-09-19NanoGPT$0.10 / $0.30
2026-09-19StepFun (Global)$0.10 / $0.30
2026-09-19StepFun (China)$0.10 / $0.30
2026-09-18EmpirioLabs AI$0.10 / $0.30
2026-09-18NanoGPT$0.10 / $0.30
2026-09-18StepFun (Global)$0.10 / $0.30
2026-09-18StepFun (China)$0.10 / $0.30
2026-09-17EmpirioLabs AI$0.10 / $0.30
2026-09-17NanoGPT$0.10 / $0.30
2026-09-17StepFun (Global)$0.10 / $0.30
2026-09-17StepFun (China)$0.10 / $0.30