Python Telemetry v3.8.0

Added

• Bring your own LLM cost. capture(name, ..., cost={"input": .., "output": ..} | {"total": ..})
  sets the cost (USD) of every LLM-call span inside the capture (never the capture's own wrapper
  span). Latitude(pricing={"<provider>/<model>": {"input_per_1m": .., "output_per_1m": ..}})
  prices LLM calls from their token counts, and Latitude(cost_resolver=fn) lets fn(usage)
  return a cost or None to fall back. set_llm_cost(span, input=, output=, total=) sets the cost of
  one span. Precedence: set_llm_cost > capture(cost=) > cost_resolver > pricing > Latitude's
  server-side pricing.
• Where the SDK sets cost it writes gen_ai.usage.input_cost, gen_ai.usage.output_cost and
  gen_ai.usage.total_cost plus latitude.cost.source="user", replacing any cost the
  instrumentation wrote on that span. total defaults to input + output, a total-only cost
  drops the instrumentation's input/output costs, and an explicit 0 is honoured. Cost is applied
  at export through an attribute-override wrapper, so other processors on a shared provider see the
  span unchanged. New exports: set_llm_cost, LlmCost, LlmUsage, ModelPricing,
  COST_SOURCE_USER and the ATTRIBUTES.cost_input / cost_output / cost_total / cost_source
  constants. LLM calls, provider, model and token counts are read from OpenTelemetry GenAI,
  OpenInference (including CrewAI's AGENT span), OpenLLMetry and Vercel AI SDK attributes, and
  cost is resolved when each span ends, before redaction.

Changed

• Dev extra now pins openai 3.3.1. openai-agents is 0.21.0 so the graph can resolve
  (0.15.1 required openai<3). LiteLLM is no longer co-installed: every published
  litellm still requires openai<3. Install it separately for the LiteLLM examples.
• openinference-semantic-conventions is 0.1.33, which openinference-instrumentation-openai
  0.1.56 requires.

Fixed

• Smart filter now promotes ancestors of kept spans (including already-ended parents held briefly
  after a drop) so exported traces stay connected when only a descendant independently passed the
  filter — e.g. a stamped tcp.connect no longer ships without its parent.