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Head to head · prices checked 22 September 2026

Claude Haiku 4.5 vs GPT-5.4 mini

Anthropic's current small model against OpenAI's previous mini, at similar list prices. Both list prices from the makers’ own pages, and what three everyday jobs cost on each.

What a job costsEvery model

US dollars, standard rate, shortest context band. Price only: this page does not rank quality.

1,000 support replies
+23%what Claude Haiku 4.5 costs next to GPT-5.4 mini
Claude Haiku 4.5
$5.00
GPT-5.4 mini
$4.05
Claude Haiku 4.5, per M tokens
$1 / $5
GPT-5.4 mini, per M tokens
$0.75 / $4.50

3,000 tokens in and 400 out each, at list price.

Per million tokens, Claude Haiku 4.5 costs $1 in and $5 out; GPT-5.4 mini costs $0.75 in and $4.50 out. 1,000 support replies cost $5.00 on Claude Haiku 4.5 and $4.05 on GPT-5.4 mini, so Claude Haiku 4.5 costs 23% more. Claude Haiku 4.5 reads up to 200K tokens at once, GPT-5.4 mini up to 400K.

Side by side

Each maker’s published rate for its standard tier. Cached input is what a repeated prompt prefix costs once the provider has stored it.

Claude Haiku 4.5 and GPT-5.4 mini: list prices and specifications
FactClaude Haiku 4.5GPT-5.4 mini
MakerAnthropicOpenAI
TierSmall and fastSmall and fast
Input, per M tokens$1.00$0.75
Output, per M tokens$5.00$4.50
Cached input$0.10$0.075
Context window200K400K
Released15 Oct 202517 Mar 2026
WeightsClosedClosed

What a job costs on each

1,000 runs of each job at the two list prices. The gap moves from job to job because the models price input, output and cached context differently.

Cost of 1,000 runs of three jobs on Claude Haiku 4.5 and GPT-5.4 mini
JobClaude Haiku 4.5GPT-5.4 miniCheaper
Support reply3,000 in, 400 out.$5.00$4.05GPT-5.4 mini, 19% less
Document summary25,000 in, 1,000 out.$30.00$23.25GPT-5.4 mini, 23% less
Agent task80,000 in (70,000 cached), 3,000 out.$32.00$26.25GPT-5.4 mini, 18% less

The token counts are ours, chosen to look like real work; the prices are the makers’. A model with no published cache price bills the agent task’s repeated context at its full input rate.

The small print

What each base rate leaves out, from the makers’ own pages: surcharges, discounts, promotions and cache pricing.

Claude Haiku 4.5
Cache write $1.25 (5 min) or $2 (1 h). Batch API 50% off. Anthropic’s pricing page
GPT-5.4 mini
Batch 50% off. Context 400,000 with max input 272K. OpenAI’s pricing page

Other comparisons

Every head to head on the list that involves Claude Haiku 4.5 or GPT-5.4 mini.

Pay a quarter of list price

AIGROW API credit is metered at the makers’ list prices, and $25 buys $100 of usage. The credit page lists the models it covers; ask about any other before buying.

See API creditCompare every model

Prices checked 22 September 2026