tokensense-ai 0.2.0

LLM cost observability and smart routing — stays in your code, works everywhere.

Visual Vortex

TokenSense

by Visual Vortex

LLM cost observability and smart routing — stays in your code, works everywhere.

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pip install tokensense-ai

from tokensense import observe
import anthropic

client = observe(anthropic.Anthropic())
response = client.messages.create(
    model="claude-sonnet-4-6",
    messages=[{"role": "user", "content": "Hello"}]
)
# → model=claude-sonnet-4-6 | in=12 out=24 tokens | $0.0003 | 847ms

That's it. One import. One wrapper. Every LLM call you make is now tracked.

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Why TokenSense?

Other observability tools make you choose between easy and private. A proxy is easy but your API keys and prompts go through someone else's server. A self-hosted platform is private but takes 30 minutes to set up before you see anything.

TokenSense does neither. It runs inside your process. Nothing leaves unless you tell it to.

• Privacy by default — prompts never leave your process. Ever. Not to us, not to anyone.
• Zero latency — the observer fires after the response returns. Your call time is unchanged.
• Works everywhere — dev, prod, Docker, Lambda, K8s. No infra required.
• Smart routing — context-budget-aware model switching with automatic escalation on failure.
• Framework agnostic — wraps OpenAI, Anthropic, Groq directly. Not tied to LangChain or anything else.
• You own the data — output to your terminal, SQLite, your existing logger, or any HTTP endpoint.

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Quickstart

Observe any LLM client

from tokensense import observe
import openai

# OpenAI
client = observe(openai.OpenAI())

# Anthropic
client = observe(anthropic.Anthropic())

# Groq
client = observe(groq.Groq())

# your existing code stays exactly the same
response = client.chat.completions.create(
    model="gpt-4o-mini",
    messages=[{"role": "user", "content": "Explain async/await"}]
)
# → model=gpt-4o-mini | in=18 out=312 tokens | $0.0001 | 623ms

Change where data goes

from tokensense import observe
from tokensense.outputs import SQLite, Logger, HTTP

# save locally — great for dev
client = observe(anthropic.Anthropic(), output=SQLite("./usage.db"))

# write to Python logger — goes to CloudWatch, Datadog, whatever you already use
client = observe(anthropic.Anthropic(), output=Logger("tokensense"))

# post to your own endpoint
client = observe(anthropic.Anthropic(), output=HTTP("https://your-server.com/ingest"))

Default output when you don't specify anything:

• In development → prints to terminal + writes to ./tokensense.db
• In production (ENV=production) → writes to Python logger, goes to your existing log infra

Add metadata per call

client = observe(
    anthropic.Anthropic(),
    user_id="user_123",
    session_id="sess_abc",
    tags=["production", "chat"],
)

Smart routing

from tokensense import Router, Rule

router = Router(
    tiers={
        "small":  ["llama-3.1-8b-instant", "claude-haiku-4-5"],
        "large":  ["claude-sonnet-4-6", "gpt-4o"],
    },
    rules=[
        # never route to small model if history is long
        Rule(if_context_tokens_gt=4000, deny_tiers=["small"]),

        # pin sensitive tasks to large model always
        Rule(if_task="legal-review", pin_tier="large"),
    ]
)

decision = router.route(
    messages=[{"role": "user", "content": "Review this contract"}],
    task_hint="legal-review"
)

print(decision.model) # → 'claude-sonnet-4-6'
print(decision.reason) # → 'pinned to large by rule'

---

What gets logged

By default, TokenSense logs only metadata — never your prompt content or response text.

Field	Logged by default	Opt-in
Model name	✅
Input tokens	✅
Output tokens	✅
Cost (USD)	✅
Latency (ms)	✅
Routing decision	✅
Status (success/error)	✅
Prompt content	❌	log_prompts=True
Response content	❌	log_responses=True
User ID / tags	❌	pass as kwargs

To enable prompt logging explicitly:

client = observe(anthropic.Anthropic(), log_prompts=True, log_responses=True)

---

Output options

Output	Best for	Setup
Stdout()	Development, debugging	None
SQLite(path)	Local persistence, single process	None
Logger(name)	Production — any log infra	None
HTTP(url)	Custom server, self-hosted dashboard	Your endpoint

from tokensense.outputs import Stdout, SQLite, Logger, HTTP

# chain multiple outputs
from tokensense.outputs import Multi

client = observe(
    anthropic.Anthropic(),
    output=Multi(Stdout(), SQLite("./usage.db"))
)

---

Supported providers

Provider	Sync	Async	Streaming
Anthropic	✅	✅	✅
OpenAI	✅	✅	✅
Groq	✅	✅	✅
Google Gemini	🔜	🔜	🔜

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No telemetry. Ever.

TokenSense does not call home. There is no usage tracking, no anonymous analytics, no background pings to any server. The framework has no network dependency of its own.

Read PRIVACY.md for exactly what is and isn't captured.

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Roadmap

• observe() wrapper — OpenAI, Anthropic, Groq
• Stdout, SQLite, Logger, HTTP outputs
• Auto environment detection (dev vs prod)
• Router with context budget check
• Shadow testing before switching tiers
• tokensense report CLI — spend summary in terminal
• OpenTelemetry (OTEL) Export — native integration with Datadog/Grafana
• Local Semantic Caching — via SQLite vector extension to save cost/latency
• LiteLLM Integration — native support for observing litellm.completion()
• Google Gemini support
• LangChain integration
• LlamaIndex integration

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Contributing

TokenSense is MIT licensed and built in public. Issues, PRs, and feedback are welcome.

git clone https://github.com/SahilSelokar/Tokensense
cd Tokensense
pip install -e ".[dev]"
pytest

See CONTRIBUTING.md for guidelines.

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License

MIT — see LICENSE

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Built by Visual Vortex