How much does the OpenAI GPT-5.4 API cost?

GPT-5.4 API pricing is $2.50 per million input tokens and $15.00 per million output tokens. Use our calculator at aiapicost.com for exact cost estimates based on your usage.

Which AI model is cheapest for API usage?

The cheapest AI API models change frequently. Use aiapicost.com to compare real-time pricing across 400+ models from OpenAI, Anthropic, Google, DeepSeek, and more. DeepSeek and open-source models typically offer the lowest per-token costs.

How do AI API token costs work?

AI APIs charge per token (roughly 0.75 words). Costs are split into input tokens (what you send) and output tokens (what the model generates). Output tokens are typically 2-5x more expensive. Prices are quoted per 1 million tokens.

Claude vs ChatGPT: which is better?

Both are top-tier models. Claude excels at coding and instruction-following, while GPT-5.4 offers broader multimodal capabilities. Compare them head-to-head at aiapicost.com/compare with real benchmark data.

What is the best LLM in 2026?

Claude Fable 5 leads the Artificial Analysis Intelligence Index at 59.9 (July 2026), followed by Claude Opus 4.8 (II 55.7), GPT-5.5 (II 54.8), Gemini 3 Pro Preview, and GPT-5.4. Use the live calculator above to compare pricing, benchmark scores (GPQA, AIME, HLE, MMLU-Pro, SWE-bench), and tokens-per-second speed side-by-side.

What is the cheapest LLM API in 2026?

Cheapest by blended $/M tokens (input + output at typical 3:1 ratio): the open-source tier (DeepSeek, Qwen, Mistral, gpt-oss) ranges from $0.05–$0.30/M blended. Budget proprietary options like Gemini 3 Flash-Lite and Claude Haiku 4.5 sit around $0.40–$0.80/M blended. Top-tier models (Claude Fable 5, GPT-5.5) run $3–$15/M blended. The Cheapest AI Models list above updates hourly from Artificial Analysis.

Claude vs GPT vs Gemini — which is cheapest?

On a blended 3:1 input:output ratio in July 2026: Gemini 3 Pro Preview ($2/$12 per 1M) is the cheapest top-tier option; GPT-5.4 ($2.50/$15) is mid; Claude Opus 4.8 ($15/$75) is the most expensive. Claude Fable 5 (premium tier) trails GPT-5.5 ($5/$25) on output cost. For pure coding workloads, see the coding plans comparison page.

What is the best LLM for coding in 2026?

Claude Fable 5 tops the Artificial Analysis Coding Index at 76.5, followed by GPT-5.5 (xhigh) at 74.9, Claude Opus 4.8 at 74.3, and Claude Sonnet 4.6 at 70+. For budget coding, DeepSeek V3.2 Speciale and Qwen3.6-Max both score above 70 at 1/10 the price. See the live /best-for/coding page for the current top 20 ranked by SWE-bench, LiveCodeBench, and Coding Index.

Best LLM 2026: Claude Fable 5 vs Claude Opus 4.8 vs GPT-5.5

Most-Compared AI Models (July 2026)

Real-time head-to-head comparisons of the AI models developers actually pick between — pricing per 1M tokens, 12 benchmarks (GPQA, AIME, HLE, MMLU-Pro, LiveCodeBench, SWE-bench), and tokens/second speed. Updated hourly from Artificial Analysis.

Claude Opus 4.6 (Non-reasoning, High Effort) vs GPT-5.4 (xhigh)$10.00/M · $5.63/M
Claude Sonnet 4.6 (Non-reasoning, High Effort) vs GPT-5.4 (xhigh)$6.00/M · $5.63/M
GPT-5.4 (xhigh) vs Gemini 3 Pro Preview (high)$5.63/M · $4.50/M
Claude Opus 4.6 (Non-reasoning, High Effort) vs Gemini 3 Pro Preview (high)$10.00/M · $4.50/M
DeepSeek V3.2 (Non-reasoning) vs GPT-5.4 (xhigh)$0.32/M · $5.63/M
DeepSeek R1 0528 (May '25) vs Claude Opus 4.6 (Non-reasoning, High Effort)$2.06/M · $10.00/M

Frequently Asked Questions — AI Model Comparison (July 2026)

What is the best LLM in 2026?: Claude Fable 5 leads the Artificial Analysis Intelligence Index at 59.9 (July 2026), followed by Claude Opus 4.8 (II 55.7), GPT-5.5 (II 54.8), Gemini 3 Pro Preview, and GPT-5.4. Use the live calculator above to compare pricing, benchmark scores (GPQA, AIME, HLE, MMLU-Pro, SWE-bench), and tokens-per-second speed side-by-side.
What is the cheapest LLM API in 2026?: Cheapest by blended $/M tokens (input + output at typical 3:1 ratio): the open-source tier (DeepSeek, Qwen, Mistral, gpt-oss) ranges from $0.05–$0.30/M blended. Budget proprietary options like Gemini 3 Flash-Lite and Claude Haiku 4.5 sit around $0.40–$0.80/M blended. Top-tier models (Claude Fable 5, GPT-5.5) run $3–$15/M blended. The Cheapest AI Models list above updates hourly from Artificial Analysis.
Claude vs GPT vs Gemini — which is cheapest?: On a blended 3:1 input:output ratio in July 2026: Gemini 3 Pro Preview ($2/$12 per 1M) is the cheapest top-tier option; GPT-5.4 ($2.50/$15) is mid; Claude Opus 4.8 ($15/$75) is the most expensive. Claude Fable 5 (premium tier) trails GPT-5.5 ($5/$25) on output cost. For pure coding workloads, see the coding plans comparison page.
What is the best LLM for coding in 2026?: Claude Fable 5 tops the Artificial Analysis Coding Index at 76.5, followed by GPT-5.5 (xhigh) at 74.9, Claude Opus 4.8 at 74.3, and Claude Sonnet 4.6 at 70+. For budget coding, DeepSeek V3.2 Speciale and Qwen3.6-Max both score above 70 at 1/10 the price. See the live /best-for/coding page for the current top 20 ranked by SWE-bench, LiveCodeBench, and Coding Index.

Most-Compared AI Models (July 2026)

Cheapest AI Models by API Price (blended $/M tokens)

Compare AI Models 2026 — Claude Fable 5, Opus 4.8, GPT-5.5 Side-by-Side

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Frequently Asked Questions — AI Model Comparison (July 2026)

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