Alternatives
Best cheaper alternatives to GPT-5.3 Chat
Looking for a cheaper or smarter replacement for GPT-5.3 Chat by OpenAI? We compared every LLM model with verifiable pricing on real input/output cost, context window, intelligence and modalities.
Category: LLM 400K context
Gemini 1.5 Flash-8B
Google
Larger contextMore modalitiesSame category
$0.0375 in · $0.15 out / 1M Tokens 36 1.0M ctx 98%
Gemini 1.5 Flash
Google
Larger contextMore modalitiesSame category
$0.075 in · $0.3 out / 1M Tokens 48 1.0M ctx 98%
Gemini 3.1 Flash-Lite Preview
Google
Larger contextMore modalitiesSame category
$0.25 in · $1.5 out / 1M Tokens 1.0M ctx 98%
Gemini 1.5 Pro
Google
Larger contextMore modalitiesSame category
$3.5 in · $10.5 out / 1M Tokens 58 2.1M ctx 98%
Gemini 2.0 Flash
Google
Larger contextMore modalitiesSame category
$0.1 in · $0.4 out / 1M Tokens 56 1.0M ctx 80%
Gemini 3.1 Flash-Lite
Google
Larger contextMore modalitiesSame category
$0.25 in · $1.5 out / 1M Tokens 1.0M ctx 80%
Gemini 2.5 Flash
Google
Larger contextMore modalitiesSame category
$0.3 in · $2.5 out / 1M Tokens 68 1.0M ctx 80%
Gemini 3 Flash Preview
Google
Larger contextMore modalitiesSame category
$0.5 in · $3 out / 1M Tokens 1.0M ctx 80%
Gemini 3.5 Flash
Google
Larger contextMore modalitiesSame category
$1.5 in · $9 out / 1M Tokens 1.0M ctx 80%
Gemini 2.5 Pro
Google
Larger contextMore modalitiesSame category
$1.25 in · $10 out / 1M Tokens 76 1.0M ctx 80%
GPT-5.4 Pro
OpenAI
Larger contextSame category
$30 in · $180 out / 1M Tokens 1.1M ctx 98%
GPT-5.5 Pro
OpenAI
Larger contextSame category
$30 in · $180 out / 1M Tokens 1.1M ctx 98%
GPT 4.1 Mini
OpenAI
Larger contextSame category
$0.000263 in · $1.25512 out / 1M Tokens 53 1.0M ctx 82%
GPT 4.1 Nano
OpenAI
Larger contextSame category
$0.000263 in · $1.25512 out / 1M Tokens 41 1.0M ctx 82%
GPT-5.5
OpenAI
Larger contextSame category
$0.5 in · $5 out / 1M Tokens 1.1M ctx 82%
GPT-5.4
OpenAI
Larger contextSame category
$2.5 in · $15 out / 1M Tokens 1.1M ctx 82%
Grok 4.3
xAI
Larger contextSame category
$1.25 in · $2.5 out / 1M Tokens 1M ctx 80%
Gemini 3.1 Pro Preview
Google
Larger contextSame category
$2 in · $12 out / 1M Tokens 1.0M ctx 80%
Costs are normalised to a blended 1M-token workload (or per-unit price for non-token models) using each model's latest verified pricing. Models with pricing under review are excluded from recommendations.