Which is cheaper, GPT-5.1 Codex High or Inkling-Small?
As of August 20, 2026, Inkling-Small is 87% cheaper on blended LLM API pricing. Inkling-Small costs $0.30 per million input tokens and $1.20 per million output tokens ($1.50 blended 1M-in + 1M-out). GPT-5.1 Codex High costs $1.25 / $10.00 per million tokens ($11.25 blended). Sources: https://developers.openai.com/api/docs/pricing and https://thinkingmachines.ai. The cheapest LLM for your app still depends on how many output tokens you generate.
How much does GPT-5.1 Codex High vs Inkling-Small cost per million tokens?
GPT-5.1 Codex High OpenAI API pricing is $1.25 input and $10.00 output per million tokens via OpenAI. Inkling-Small Thinking Machines Lab API pricing is $0.30 input and $1.20 output per million tokens via Thinking Machines Lab. Use those four numbers, not ChatGPT Plus or Claude Pro subscription prices, when you are comparing APIs.
Which is better for coding, GPT-5.1 Codex High or Inkling-Small?
Inkling-Small has a published SWE-bench Verified score of 80.2%. GPT-5.1 Codex High does not have that eval on this page yet.
What is the context window for GPT-5.1 Codex High vs Inkling-Small?
GPT-5.1 Codex High supports a 400K token context window, while Inkling-Small supports 256K tokens. GPT-5.1 Codex High offers a larger context window. Filling a larger window bills more input tokens, so the cheaper-per-million model can still cost more on long documents.
Which model performs better on benchmarks, GPT-5.1 Codex High or Inkling-Small?
GPT-5.1 Codex High leads on 1 of 1 shared benchmarks versus Inkling-Small's 0 wins. Check the comparison table for GPQA Diamond, SWE-bench, MMLU, HLE, and the other evals we track. Token price and benchmark score together are the usual LLM comparison, not either number alone.
Is GPT-5.1 Codex High or Inkling-Small better for production use?
Both GPT-5.1 Codex High and Inkling-Small are production API models. For cost-sensitive production traffic, Inkling-Small has better economics on the blended 1M-in + 1M-out scale. For maximum capability, weight the benchmark table for your domain. Many production stacks route cheap models for drafts and a frontier model for the hard turn, which is usually cheaper than sending everything to the expensive API.
Can I switch between GPT-5.1 Codex High and Inkling-Small in my app?
Yes. Call GPT-5.1 Codex High through OpenAI and Inkling-Small through Thinking Machines Lab with separate API keys, or through a gateway that already wraps both. Keep prompts in tokens, not characters, when you estimate the invoice. AnotherWrapper templates can swap providers without rewriting auth and billing.
How accurate is this GPT-5.1 Codex High vs Inkling-Small pricing data?
List rates are the latest published OpenAI API pricing and Thinking Machines Lab API pricing, quoted per million tokens. Official rate sheets: https://developers.openai.com/api/docs/pricing and https://thinkingmachines.ai. Prompt caching, batch APIs, and committed-use discounts can change the invoice. Benchmark scores are from official publications and independent evals, updated as new numbers land.
What is the output token limit for GPT-5.1 Codex High and Inkling-Small?
GPT-5.1 Codex High supports up to 128K output tokens per request, while Inkling-Small supports up to 256K output tokens. Output tokens are usually the expensive half of API pricing, so a higher max output cap is a capability, not a discount.
Which model has better throughput, GPT-5.1 Codex High or Inkling-Small?
GPT-5.1 Codex High has a measured throughput of approximately 50 tokens/second. Throughput data for Inkling-Small is not yet available. Throughput (tokens per second) and time-to-first-token are why two models with the same per-million-token price can still feel different in chat and agents.
How do I switch the models in this GPT-5.1 Codex High vs Inkling-Small comparison?
Use the model pickers at the top of this LLM comparison. Search any model in the index and the URL updates. Open GPT-5.1 Codex High or Inkling-Small from the sidebar for the single-model API pricing page, or go back to the LLM pricing table to sort by cheapest blended cost.
