Claude Haiku 5.5 vs GPT-5.4 Nano: short requests & budget limits
A short classification request and a long document extraction request can produce very different price comparisons. Haiku 5.5 and GPT-5.4 Nano make that distinction especially useful.
Check the request size before the unit price
Haiku's base input/output rates are $0.10/$0.50 per million tokens, while Nano lists $0.20/$1.25. Haiku moves to a full-request higher tier above 100,000 input tokens. Compare the actual request size, not just the directory's base input column.
Context ceilings constrain the same workload
Haiku documents a 1,000,000-token shared context window. Nano documents 400,000 combined context tokens, a 272,000 input-token limit and 128,000 maximum output. The input and output limits must be satisfied together; the maximum for each field cannot always be used simultaneously.
Keep quality checks close to the task
For routing or extraction, define a schema and a small set of expected answers. Provider support shown in Developer mode is specification evidence; it does not replace measuring incorrect classifications or missing fields. No task accuracy data is invented here.
Documented specifications and standard direct API rates, manually checked 2026-10-09. Evaluation suggestions are editorial guidance; no measured comparative quality or speed is claimed.
Unknown fields are not evidence of equal capabilities. Specifications describe support, not comparative answer quality.
BENCHMARK EVIDENCE
No reliable data available
Comparable results with confirmed reuse permission have not been published here yet.
A published result must include the exact model version, benchmark version, original value and unit, test date, conditions and source. No scores or overall rankings are inferred.
Text tokens only. Billable output includes reasoning tokens where applicable. Excludes cache creation, tools, media and regional or processing-tier uplifts.
KNOW YOUR API COST
A small prompt. A clearer budget.
Same token counts for both models. Standard paid text rates in USD. Output must include all billable reasoning tokens.
Cached input is included in total input. No cache creation/storage, tools, media, taxes or regional/priority/Batch fees. Tokenizers differ; equal token counts do not imply equal text length.
2 estimated credits / comparison2,000 credits across 1,000 comparisons.Reference estimate only. Playground uses verified OpenRouter charges; 1,000 credits = $1. A + B round up together once for each comparison.
See how your prompt behaves.
Choose an enabled official model pair in the Playground. Your maximum reservation is shown before running; confirmed usage determines the final charge.