OpenAI vs Anthropic API Pricing (2026): Full Cost Comparison
Detailed side-by-side comparison of OpenAI and Anthropic API pricing in 2026. GPT-5.4 vs Claude 4.6 — input, output, cached token costs, batch discounts, and real-world cost calculations.
OpenAI and Anthropic are the two dominant API providers in 2026, and picking between them can save (or cost) you thousands of dollars a month. This guide breaks down every pricing detail so you can make the right call for your use case.
Last updated: April 16, 2026. All prices verified against official pricing pages.
The Short Answer
OpenAI is cheaper at sticker price across every comparable tier. Anthropic claws back ground through aggressive prompt caching (90% off input) and is widely considered to have the best coding model in Claude Sonnet 4.6. If you can engineer high cache-hit rates, Anthropic’s effective cost can beat OpenAI on input tokens.
Full Model Lineup: Head-to-Head
Flagship Tier
| GPT-5.4 | Claude Opus 4.6 | |
|---|---|---|
| Input | $2.50/M tokens | $5.00/M tokens |
| Cached input | $0.25/M tokens | $0.50/M tokens |
| Output | $15.00/M tokens | $25.00/M tokens |
| Cache discount | 90% off | 90% off |
| Batch discount | 50% off | — |
GPT-5.4 is 50% cheaper on input and 40% cheaper on output at standard rates. Both offer 90% cache discounts on input, so the 2:1 ratio holds even with caching.
OpenAI’s batch API (50% off, 24-hour SLA) has no Anthropic equivalent. For async workloads, GPT-5.4 batch pricing ($1.25 input / $7.50 output) undercuts Claude Opus 4.6’s standard rate by 75% on input.
Mid Tier (The Production Workhorses)
| GPT-5.4 mini | Claude Sonnet 4.6 | |
|---|---|---|
| Input | $0.75/M tokens | $3.00/M tokens |
| Cached input | $0.075/M tokens | $0.30/M tokens |
| Output | $4.50/M tokens | $15.00/M tokens |
| Cache discount | 90% off | 90% off |
This is the biggest gap. GPT-5.4 mini is 4x cheaper on input and 3.3x cheaper on output than Claude Sonnet 4.6. Even with full caching on both sides, GPT-5.4 mini ($0.075) is still 4x cheaper than Sonnet ($0.30) on cached input.
However, Claude Sonnet 4.6 has earned a reputation as the best coding model available. Many teams willingly pay the premium for code generation, refactoring, and complex reasoning tasks.
Budget Tier
| GPT-5.4 nano | Claude Haiku 4.5 | |
|---|---|---|
| Input | $0.20/M tokens | $1.00/M tokens |
| Cached input | $0.02/M tokens | $0.10/M tokens |
| Output | $1.25/M tokens | $5.00/M tokens |
GPT-5.4 nano is 5x cheaper on input and 4x cheaper on output than Claude Haiku 4.5. This is OpenAI’s strongest pricing advantage — there’s simply no Anthropic model at this price point.
For classification, extraction, summarization, and other high-volume tasks, GPT-5.4 nano at $0.20/M input is hard to beat.
Reasoning Models
| o3 | o4-mini | (No Anthropic equivalent) | |
|---|---|---|---|
| Input | $2.00/M | $1.10/M | — |
| Cached input | $0.50/M | $0.275/M | — |
| Output | $8.00/M | $4.40/M | — |
OpenAI has a dedicated reasoning model line (o-series) with no direct Anthropic counterpart. If your workload benefits from chain-of-thought reasoning at the API level, OpenAI is your only option between these two providers.
Legacy Models Still Available
Both providers maintain older models at their original prices:
| Provider | Model | Input | Output | Status |
|---|---|---|---|---|
| OpenAI | GPT-4.1 | $2.00 | $8.00 | Active |
| OpenAI | GPT-4.1 mini | $0.40 | $1.60 | Active |
| OpenAI | GPT-4.1 nano | $0.10 | $0.40 | Active |
| OpenAI | GPT-4o | $2.50 | $10.00 | Active |
| OpenAI | GPT-4o mini | $0.15 | $0.60 | Active |
| Anthropic | Claude Sonnet 4.5 | $3.00 | $15.00 | Legacy |
| Anthropic | Claude Opus 4.5 | $5.00 | $25.00 | Legacy |
Notable: GPT-4.1 nano ($0.10 input / $0.40 output) is the cheapest model from either provider, and GPT-4o mini ($0.15 / $0.60) is close behind.
Caching: Where Anthropic Fights Back
Both providers offer prompt caching that dramatically reduces input costs for repeated context. The mechanics differ:
OpenAI: Automatic caching. Any repeated prefix is cached automatically. 50% discount on cached tokens. Simple — no code changes needed.
Anthropic: Explicit caching. You mark specific content blocks with cache_control breakpoints. 90% discount on cache hits. Requires code changes but gives you precise control.
The math: With 90% of input tokens hitting cache on both sides:
| Scenario | GPT-5.4 effective input | Claude Opus 4.6 effective input |
|---|---|---|
| 0% cache hit | $2.50 | $5.00 |
| 50% cache hit | $1.38 | $2.75 |
| 90% cache hit | $0.48 | $0.95 |
| 100% cache hit | $0.25 | $0.50 |
OpenAI maintains its 2x advantage at every cache-hit rate.
Real-World Cost Comparison
Scenario 1: Coding Assistant (10M input + 5M output per day)
GPT-5.4 mini (no caching):
- Input: 10M × $0.75/M = $7.50
- Output: 5M × $4.50/M = $22.50
- Daily: $30.00 → $900/month
Claude Sonnet 4.6 (no caching):
- Input: 10M × $3.00/M = $30.00
- Output: 5M × $15.00/M = $75.00
- Daily: $105.00 → $3,150/month
Difference: $2,250/month ($27,000/year). That’s significant even for well-funded teams.
With 80% cache-hit rate on input:
- GPT-5.4 mini: (2M × $0.75 + 8M × $0.075) + (5M × $4.50) = $1.50 + $0.60 + $22.50 = $24.60/day → $738/month
- Claude Sonnet 4.6: (2M × $3.00 + 8M × $0.30) + (5M × $15.00) = $6.00 + $2.40 + $75.00 = $83.40/day → $2,502/month
Even with aggressive caching, the gap remains ~$1,764/month.
Scenario 2: Customer Support Bot (50M input + 10M output per day)
GPT-5.4 nano:
- Input: 50M × $0.20/M = $10.00
- Output: 10M × $1.25/M = $12.50
- Daily: $22.50 → $675/month
Claude Haiku 4.5:
- Input: 50M × $1.00/M = $50.00
- Output: 10M × $5.00/M = $50.00
- Daily: $100.00 → $3,000/month
Difference: $2,325/month. For high-volume, lower-complexity tasks, OpenAI’s nano tier is unbeatable.
Scenario 3: Premium Analysis (1M input + 500K output per day)
GPT-5.4:
- Input: 1M × $2.50/M = $2.50
- Output: 0.5M × $15.00/M = $7.50
- Daily: $10.00 → $300/month
Claude Opus 4.6:
- Input: 1M × $5.00/M = $5.00
- Output: 0.5M × $25.00/M = $12.50
- Daily: $17.50 → $525/month
Difference: $225/month. At lower volumes, the absolute dollar difference shrinks. If Claude Opus gives you measurably better output quality, the premium may be worth it.
When to Choose OpenAI
- High-volume production workloads — GPT-5.4 mini and nano are 3–5x cheaper than Anthropic’s equivalents
- Async/batch processing — OpenAI’s batch API (50% off, no Anthropic equivalent) cuts costs further
- Budget-conscious startups — GPT-5.4 nano at $0.20/M input has no competition
- Reasoning tasks — o3 and o4-mini have no Anthropic counterpart
- Multi-tier architecture — OpenAI’s 6 active models (nano → mini → full, across two generations) give you more price points to optimize
When to Choose Anthropic
- Coding — Claude Sonnet 4.6 is widely considered the best coding model, and the quality difference may justify 3–4x the price
- Long-context work — Claude’s 200K context window with explicit caching gives you precise control over what stays in context
- Complex reasoning at the top end — Claude Opus 4.6 excels at nuanced analysis and creative tasks
- Safety-critical applications — Anthropic’s constitutional AI approach may align better with your compliance requirements
Model Count Comparison
| OpenAI | Anthropic | |
|---|---|---|
| Active models | 10 | 3 |
| Budget options (< $0.50/M) | 4 | 0 |
| Mid-range ($0.50–$3.00/M) | 4 | 2 |
| Premium ($3.00+/M) | 2 | 1 |
| Reasoning models | 2 | 0 |
OpenAI offers far more price points. Anthropic focuses on fewer, higher-quality models. Your choice depends on whether you value options or simplicity.
Our Verdict
For most teams, OpenAI is the better value in 2026. GPT-5.4 mini offers the best price-to-performance ratio in the industry, and the nano tier opens up use cases that would be cost-prohibitive with Anthropic. Try OpenAI →
The exception is coding. If code generation is your primary use case, Claude Sonnet 4.6 is worth the premium. Many engineering teams run a dual-provider setup: Claude for coding, OpenAI for everything else. Try Claude →
Use our token cost calculator to model your specific usage pattern, or check the full pricing comparison for all providers including Google, DeepSeek, and Mistral. For a head-to-head deep dive, see our ChatGPT vs Claude pricing comparison, and if you’re writing high-volume content, tools like Writesonic offer AI writing from $13/month with a free trial — a flat-rate alternative to paying per token.
Pricing data sourced directly from OpenAI’s pricing page and Anthropic’s pricing page. Updated daily. See our methodology for details.