Proposed multi-provider capabilities and pricing API. Blog post: https://paolino.me/standard-api-llm-capabilities-pricing/

model.yml

# This is a YAML file so I can have comments but the API should obviously return an array of models in JSON.
# Legend:
#  Required: this is important to have in v1.
#  Optional: this is still important but can wait for v2.

id: gpt-4.5-preview                     # Required, will match it with the OpenAI API
display_name: GPT-4.5 Preview           # Required
provider: openai                        # Required
family: gpt45                           # Optional, each model page is a family for OpenAI models
context_window: 128000                  # Required
max_output_tokens: 16384                # Required
knowledge_cutoff: 20231001              # Optional

modalities:
  text:
    input: true             # Required
    output: true            # Required
  image:
    input: true             # Required
    output: false           # Required
  audio:
    input: false            # Required
    output: false           # Required
  pdf_input: false          # Optional - from Anthropic and Google
  embeddings_output: false  # Required
  moderation_output: false  # Optional

capabilities:
  streaming: true           # Optional
  function_calling: true    # Required
  structured_output: true   # Required
  predicted_outputs: false  # Optional
  distillation: false       # Optional
  fine_tuning: false        # Optional
  batch: true               # Required
  realtime: false           # Optional
  image_generation: false   # Required
  speech_generation: false  # Required
  transcription: false      # Required
  translation: false        # Optional
  citations: false          # Optional - from Anthropic
  reasoning: false          # Optional - called Extended Thinking in Anthropic's lingo

pricing:
  text_tokens:
    standard:
      input_per_million: 75.0           # Required
      cached_input_per_million: 37.5    # Required
      output_per_million: 150.0         # Required
      reasoning_output_per_million: 0   # Optional
    batch:
      input_per_million: 37.5           # Required
      output_per_million: 75.0          # Required
  images:
    standard:
      input: 0.0                        # Optional
      output: 0.0                       # Optional
    batch:
      input: 0.0                        # Optional
      output: 0.0                       # Optional
  audio_tokens:
    standard:
      input_per_million: 0.0            # Optional
      output_per_million: 0.0           # Optional
    batch:
      input_per_million: 0.0            # Optional
      output_per_million: 0.0           # Optional
  embeddings:
    standard:
      input_per_million: 0.0            # Required
    batch:
      input_per_million: 0.0            # Required

Thank you so much for the info @MadBomber!