← Voltar aos guias

Why Output Tokens Cost More: 9 Ways to Cut Them

Why generated tokens carry a higher price

Input tokens are the text you send to a model: instructions, chat history, code, and documents. Output tokens are the tokens the model generates in reply. On most LLM pricing tables, output costs more because generation is inherently sequential. During input processing, the model can evaluate many tokens in a prefill pass. During output generation, it predicts one next token, updates its context state, then repeats until it reaches a stop condition.

That repeated inference work makes a 1,500-token response materially more expensive than a 1,500-token prompt. Long outputs also increase latency, can consume more rate-limit capacity, and make downstream parsing harder. For coding agents, a verbose explanation can cost nearly as much as the actual patch.

9 practical ways to shorten outputs

• Set a hard output budget. Ask for a maximum number of words, bullets, lines, or JSON fields. For example: “Return no more than six bullets, 18 words each.” A concrete limit works better than asking the model to “be concise.”
• Specify the response shape. Models fill available conversational space unless you define an endpoint. Request a three-step checklist, a single SQL query, or a compact JSON object with named keys. Avoid open-ended prompts such as “explain everything about this.”
• Separate action from explanation. In developer workflows, request the command, patch, or answer first and only ask for reasoning when needed. “Return the diff only” is often sufficient for a focused fix.
• Use stop sequences where supported. A stop sequence can end completion after a known delimiter, such as the closing marker of a generated record. Choose a delimiter that cannot naturally appear in the intended output, and test it against real responses.
• Lower max tokens deliberately. Set the API’s maximum completion or output-token parameter close to the job’s real ceiling. Leave a small buffer for valid completion, but do not default to the model’s largest allowance for a one-paragraph task.
• Ask one question at a time. Combining research, analysis, recommendations, examples, and implementation in one request invites a long answer. Break the work into stages and only continue after the prior result proves useful.
• Remove duplicated context. Repeated system instructions, copied conversation history, and full files can make models restate context before answering. Send only the relevant function, error, or document section, with enough surrounding detail to preserve meaning.
• Use structured extraction prompts. For classification or data extraction, tell the model to return only requested fields and use empty values when evidence is missing. This prevents invented prose around every record.
• Choose the right model for the task. Use a smaller or faster model for tagging, routing, cleanup, and straightforward transformations. Reserve premium reasoning models for decisions where their added capability changes the result.

Do not shorten the wrong thing

Saving output tokens should not mean cutting requirements so aggressively that the model produces incomplete work. The goal is useful density. For a code review, request a fixed number of findings with file paths, severity, and a concrete fix. For customer support, ask for a short answer plus the one next action. For summarization, define the audience and the facts that must survive compression.

Track both completion length and task success. If a 200-token cap causes retries, missing fields, or manual cleanup, the apparent saving disappears. A good process starts with a realistic cap, samples production outputs, then tightens the limit until quality begins to drop.

Keep model access economical

Token discipline matters most when it is paired with competitive model access. 59API is a low-cost, pay-as-you-go AI API relay for native official-quality Claude models, including Opus, Sonnet, Haiku, and Fable, plus GPT models, without a model downgrade. Its API base URL is https://api.59api.com, and it is compatible with Claude Code, Codex, and OpenAI SDK integrations, so teams can apply output limits without rebuilding their existing tooling.

For recurring development workloads, lower relay pricing and shorter completions compound into meaningful savings. 59API also offers a referral rebate. Sign up for 59API when you are ready to test concise prompts against the models and SDK workflow your team already uses.

Preços · Docs