tokentoken

Compile human prompts into dense LLM machine language — save up to 70% on token costs.

tokentoken is a Python SDK and CLI that compresses verbose text into a minimal, LLM-native representation that any capable model can interpret without a codebook — and recovers it on demand.

Based on the research paper Large Language Models Do Not Always Need Readable Language (arXiv:2606.19857).

Features

• 14 compression modes — every prompt variant from the paper (default + bt_p1–bt_p13)
• 4 providers — OpenAI, Google Gemini, Anthropic, and local Ollama
• Cross-model readable — text compressed by one LLM can be read by another
• Built-in analytics — token savings, retention ratio, readability and efficiency metrics
• Agentic workflows — agent memory compression, multi-agent messaging, context-window extension
• Clean CLI — inline text or file input, one-line errors, meaningful exit codes

Installation

PyPi

pip install tokentoken

From Source

Requires Python 3.9+.

git clone https://github.com/thesumitbanik/tokentoken.git
cd tokentoken
pip install .

For development:

pip install -e ".[dev]"

Configuration

API keys are read from environment variables — never hardcode them:

export GEMINI_API_KEY="..."      # default provider
export OPENAI_API_KEY="..."
export ANTHROPIC_API_KEY="..."
# Ollama needs no key (local, http://localhost:11434)

Provider	--provider	Environment variable	Example --model
Google Gemini	gemini (default)	GEMINI_API_KEY	gemini-3.5-flash (default)
OpenAI	openai	OPENAI_API_KEY	gpt-4
Anthropic	anthropic	ANTHROPIC_API_KEY	claude-3-5-sonnet
Ollama	ollama	—	llama3

OpenAI-compatible endpoints

Point the openai provider at any OpenAI-compatible server — vLLM, LM Studio, LocalAI, OpenRouter, or Ollama's /v1 API:

export OPENAI_API_KEY="not-needed"   # placeholder for keyless local servers
tokentoken compress --text "..." --provider openai --model my-model \
  --base-url http://localhost:1234/v1

tt = TokenToken(provider="openai", model="my-model", base_url="http://localhost:1234/v1")

No flag needed if you prefer environment configuration: the OpenAI client reads OPENAI_BASE_URL automatically.

Quick Start

Python SDK

from tokentoken import TokenToken, CompressionMode

# Uses GEMINI_API_KEY from the environment (or pass api_key="...")
tt = TokenToken(provider="gemini", model="gemini-3.5-flash")

result = tt.compress("Your verbose text here...", mode=CompressionMode.DEFAULT)

print(f"Original:   {result.original_tokens} tokens")
print(f"Compressed: {result.compressed_tokens} tokens")
print(f"Reduction:  {result.savings_pct}%")

# Any capable LLM can interpret it — no codebook required
answer = tt.decompress(result.dense_text, question="What is the main topic?")

CLI

# Compress a file
tokentoken compress input.txt --out dense.txt

# Or inline text — no file needed
tokentoken compress --text "Your verbose text here..."

# Read it back
tokentoken decompress dense.txt --question "What is the main topic?"

# Explore
tokentoken --help
tokentoken list-modes

CLI Reference

Run any command with --help for full options.

Command	Description
compress	Compress a file or inline --text; writes --out (default dense.txt)
decompress	Interpret compressed text; optional --question to answer from it
analyze	Measure compression potential; add --compressed to compare against an output
list-modes	List all 14 compression modes with paper references
estimate	Count tokens in a file
agent-memory	Compress agent conversation histories from a directory
multi-agent	Compress an inter-agent message between --sender and --receiver
cross-model	Verify compressed text remains readable by a different model
extend-context	Compress a long document down to a --target-tokens budget

Common options: --provider (default gemini), --model (default gemini-3.5-flash), --out/-o, --mode (for compress), and --base-url (OpenAI-compatible endpoints).

Failures print a single-line error and exit with code 1 — never a traceback.

Python API

TokenToken(provider, model, api_key=None, host=None, base_url=None)

Method	Returns	Description
compress(text, mode=CompressionMode.DEFAULT)	CompressionResult	Compress text into dense form
decompress(text, question=None)	str	Interpret compressed text / answer a question
compress_for_agent_memory(memories, session_id=None)	AgentMemoryResult	Compress conversation histories
compress_for_multi_agent(message, sender, receiver)	MultiAgentMessage	Compress inter-agent messages
check_cross_model_compatibility(text, reader_provider, reader_model)	CrossModelCompatibility	Test readability across models
extend_context_window(long_text, target_tokens=200000)	str	Compress long documents to a token budget
get_compression_analytics(original, compressed)	dict	Detailed compression metrics

Utility functions are exported at package level: count_tokens, check_breakeven_threshold, chunk_text, calculate_compression_metrics, estimate_readability, calculate_token_efficiency, validate_compression_result.

CompressionResult

Field	Type	Description
dense_text	str	The compressed output
original_tokens	int	Input token count
compressed_tokens	int	Output token count
savings_pct	float	Token reduction in percent
retention_ratio	float	Output size ÷ input size
readability_metrics	dict	Dale-Chall estimate, difficult-word ratio, word count
efficiency_metrics	dict	Tokens per word, chars per token, compression potential
validation	dict	Quality checks + chain-of-thought tax warning

Compression Modes

Select with --mode bt_p7 (CLI) or mode=CompressionMode.BT_P7 (SDK).

Mode	Paper ref	Description
default	C.1	Default compression prompt
bt_p1	C.2.1	Adaptive Symbolic Collapse
bt_p2	C.2.2	Refined Zero-Overhead Compression
bt_p3	C.2.3	Minimal Lossless Objective
bt_p4	C.2.4	Structured Omnilingual Mapping
bt_p5	C.2.5	Canonical Omnilingual-Symbolic
bt_p6	C.2.6	Structured Mapping Control
bt_p7	C.2.7	Canonical Compression Objective
bt_p8	C.2.8	Fixed Symbolic Mapping Rules
bt_p9	C.2.9	Structured Semantic Mapping
bt_p10	C.2.10	LLM-Native Compressor
bt_p11	C.2.11	Compact Symbolic Mapping
bt_p12	C.2.12	Free-Emergence Attention Checklist
bt_p13	C.2.13	ASCII Anchor Skeleton

How It Works

---
config:
  look: handDrawn
  theme: neutral
---
flowchart LR
    A["Verbose human text"] --> B["Compress: paper prompt + your LLM"]
    B --> C["Dense text (~30% of tokens)"]
    C --> D["Decompress: any capable LLM"]
    D --> E["Answers / full meaning"]

Compression swaps verbose natural language for high-density multilingual and symbolic forms. No decoder, codebook, or fine-tuning is involved — interpretation is a capability the reading LLM already has.

Use Cases

• Document QA - compress long documents while preserving semantic fidelity for question answering
• Agent memory - compress conversation histories to reduce storage while maintaining reliable recall
• Multi-agent communication - cut context overhead between collaborating agents
• Context window extension - handle documents that exceed model limits by compressing chunks

Contributing

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

Issues and pull requests are welcome.

License

MIT — see LICENSE.