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MODEL LIBRARY

StepFun Step Plan (Global)stepfun-ai-step-plan / step-3.5-flash-2603

Step 3.5 Flash 2603

StepFun flash model for efficient multimodal reasoning, coding, and tool use

Provider
StepFun Step Plan (Global) (stepfun-ai-step-plan)
Model identifier
step-3.5-flash-2603
Library category
Chat
Source update
2026-04-02
Release date
2026-04-02
Provider documentation
https://platform.stepfun.ai/docs/en/step-plan/integrations/reasoning-api

Source pricing and conditions

Costs retain the source structure, tiers and conditions. These snapshot values are not Allgate API quotes. Cost currency and provider billing currency are separate fields; each defaults to USD when absent.

Cost currency: USD · Provider billing currency: USD. Input, output, reasoning, cache and audio token fields use the cost currency per million tokens. Explicit per-image, per-second and per-10,000-character fields retain their named units and resolution conditions.

Tier prices apply above the stated size. When tiers exist, source logic ignores the legacy context_over_200k field. Scheduled prices override stated fields within their window; omitted fields inherit base prices. Source pricing schema

This provider entry uses a subscription. A zero cost value does not establish free access or usage.

No cost object is specified in this source entry.

Model metadata

Original source field names and values are preserved. False, zero, empty objects and missing values remain distinct. Missing capabilities are not inferred from a name, category or related version.

attachment
false
canonical_model_id
stepfun/step-3.5-flash-2603
description
StepFun flash model for efficient multimodal reasoning, coding, and tool use
family
step
id
step-3.5-flash-2603
interleaved
field
reasoning_content
knowledge
2025-01
last_updated
2026-04-02
limit
context
256000
input
256000
output
256000
modalities
input
  1. text
output
  1. text
name
Step 3.5 Flash 2603
open_weights
true
reasoning
true
reasoning_options
  1. type
    effort
    values
    1. low
    2. high
release_date
2026-04-02
temperature
true
tool_call
true

Provider reference

Provider documentation and billing metadata belong to the listed source provider. They do not describe Allgate routing or account configuration.

id
stepfun-ai-step-plan
name
StepFun Step Plan (Global)
doc
https://platform.stepfun.ai/docs/en/step-plan/integrations/reasoning-api
subscription
true
billing
priority
5

About this reference

This library reproduces the public llm-metadata snapshot: 592 model entries from 50 providers. This community maintained source does not independently verify every provider claim. Model identifiers belong to their listed provider; matching names from different providers remain separate entries. llm-metadata

Reference metadata does not establish Allgate availability or prices. Check the live model catalogue for current service and rates. Missing fields remain unknown. Source update dates are not substituted for release dates; retrieval dates are not model update dates. View live catalogue

Source: llm-metadata · Apache-2.0 · Retrieved · Source generated · Snapshot provenance