Claude vs GPT Cost Comparison 2026
Head-to-head pricing for every Claude vs GPT tier in 2026: Sonnet 4.6 vs GPT-5.5, Haiku 4.5 vs GPT-5.4 mini, Opus 4.8 vs GPT-5.5 xhigh. Real cost tables for chat, RAG and agent workloads.
Anthropic Claude and OpenAI GPT are the two default frontier choices for most teams in 2026. They're also the most direct head-to-head in the market — broadly similar capabilities, very different unit economics. This post is the full Claude vs GPT cost comparison: list prices, real-workload math, caching/batch tactics, and a clear answer for when each one wins.
All numbers cross-checked against the live data in our cost calculator, Claude pricing calculator, and OpenAI pricing calculator.
Tier-by-tier list price comparison
USD per 1M tokens. Blended assumes 70% input + 30% output, which matches typical chat/RAG/agent traffic.
| Tier | Claude | Claude $/1M | GPT | GPT $/1M | Winner |
|---|---|---|---|---|---|
| Flagship | Opus 4.8 | $5 / $25 | GPT-5.5 | $1.25 / $10 | GPT 4× cheaper |
| Workhorse | Sonnet 4.6 | $3 / $15 | GPT-5.4 mini | $0.25 / $2 | GPT 8× cheaper |
| Cheap tier | Haiku 4.5 | $1 / $5 | GPT-5.4 nano | $0.05 / $0.40 | GPT 18× cheaper |
Sources: Anthropic and OpenAI pricing pages, June 2026.
1,000 conversations on each model
| Workload | Claude Sonnet 4.6 | GPT-5.5 | Claude Haiku 4.5 | GPT-5.4 mini |
|---|---|---|---|---|
| Chat (1.5K in / 400 out) | $10.50 | $5.88 | $3.50 | $1.18 |
| RAG (8K in / 600 out) | $33.00 | $16.00 | $11.00 | $3.20 |
| Agent loop (12K in / 2K out) | $66.00 | $35.00 | $22.00 | $7.00 |
On raw list price, GPT wins every tier by a wide margin in 2026. But list price isn't the whole story — caching changes the math significantly.
The caching wildcard (Anthropic's secret weapon)
Claude's prompt caching is the most aggressive in the industry: 90% off cached input, vs OpenAI's 50%. For a 4K-token system prompt hit by 100K users/day, the math flips:
| Scenario | Claude Sonnet 4.6 | GPT-5.5 |
|---|---|---|
| No caching | $10.50 | $5.88 |
| 90/50% caching on 80% of input | $4.62 | $3.98 |
With aggressive caching, Sonnet 4.6 closes most of the gap with GPT-5.5. If your prompts are heavily templated (system prompt + few-shot + dynamic user input), Claude becomes price-competitive.
When each model actually wins
Pick GPT when…
- You want the cheapest frontier-quality output, full stop
- You're running structured outputs or function calling at high volume
- You need vision-heavy multimodal workflows (GPT-5 vision is currently ahead)
- Your prompts are dynamic and caching wouldn't help
Pick Claude when…
- You're building an agent that calls tools — Claude's tool-use reliability is best-in-class
- You have long-context RAG with a stable retrieval template (caching makes this 5× cheaper)
- You're writing or reviewing code where Sonnet's specific reasoning style matters
- Your security/compliance team prefers Anthropic's safety posture
The bottom line
On raw list price, OpenAI's GPT-5 family is now 4–18× cheaper than the equivalent Claude tier in 2026. That's a serious reversal from 2024, when the two were closely matched. But Claude's 90% caching discount keeps Sonnet 4.6 viable for high-volume cached workloads, and Anthropic still leads on tool-use reliability for agents.
The right answer for most teams in 2026 is hybrid: GPT-5.4 mini as the default tier, Claude Sonnet 4.6 for agent workloads, with both behind a router. Run the numbers for your traffic in the cost calculator, then check the agent-quality side on the comparison tool.
Related reading: GPT-5 pricing explained · Cheapest LLM API 2026 · 2026 LLM price comparison · LLM pricing history.