Anthropic API (Claude) vs OpenAI API
- ✦ Claude 3.5 Sonnet/Opus/Haiku
- ✦ 200K context window
- ✦ Vision capabilities
- ✦ GPT-4o access
- ✦ DALL-E 3
- ✦ Whisper speech-to-text
Anthropic API (Claude) and OpenAI API are both Large Language Models tools. Compare features, pricing, and ratings below to find the best fit for your team.
When to Choose Anthropic API (Claude) vs OpenAI API
The question that matters: “In what situation will I regret choosing A over B after 3 months?”
Claude 3.5 Sonnet generates JSON with sentiment, priority, product area, and next steps. Function calling writes results to internal wiki databases - no CSV imports or data entry.
The Embeddings API indexes internal knowledge bases weekly. A team chat bot queries semantically at $0.02 per 1,000 embeddings - no infrastructure rebuild needed.
The 200K context window ingests transcripts and competitor filings together. Function calling extracts guidance ranges, risk factors, and management commentary in one request.
Streaming surfaces draft summaries in real time; function calling triggers database lookups for context, then a refinement pass enforces tone before posting to channels.
Safety features scan request/response logs for PII leakage and prompt injection. Vision flags sensitive screenshots in support tickets. Batch API processes 50K logs for $8-12.
speech-to-text API transcribes inbound calls; LLM categorizes urgency and routes tickets in a single API call. Batch API handles off-peak volume spikes without extra infrastructure.
Pricing Comparison & PlansHigh· Verified May 30, 2026
Anthropic API (Claude) Plans
Free tier available
Haiku 4.5
Contact SalesBest for: This model is designed for speed and cost efficiency
- ✓Input: $1.00 per million tokens (MTok)
- ✓Output: $5.00 per million tokens (MTok)
- ✓Fastest and cheapest current-generation model
- ✓Suitable for classification, routing, extraction, and summarization
- ✓Batch API: 50% discount on all token costs for asynchronous workloads
Sonnet 4.6
Contact SalesBest for: Sonnet offers a balance of intelligence and speed, suitable for general purpose tasks
- ✓Input: $3.00 per million tokens (MTok)
- ✓Output: $15.00 per million tokens (MTok)
- ✓Production default model
- ✓Best price-to-quality ratio for general-purpose work
- ✓1 million token context window included at standard pricing
Opus 4.7
Contact SalesBest for: Opus 4.7 is Anthropic's most intelligent model, excelling in complex reasoning and advanced tasks
- ✓Input: $5.00 per million tokens (MTok)
- ✓Output: $25.00 per million tokens (MTok)
- ✓Flagship model with state-of-the-art reasoning
- ✓Enhanced vision capabilities (max 2576px / 3.75MP image resolution)
- ✓1 million token context window included at standard pricing
Opus 4.6
Contact SalesBest for: Opus 4.6 provides high intelligence for demanding tasks requiring deep understanding
- ✓Input: $5.00 per million tokens (MTok)
- ✓Output: $25.00 per million tokens (MTok)
- ✓High-capability model for coding, AI agents, and long-running engineering workflows
- ✓Batch API: 50% discount on all token costs for asynchronous workloads
- ✓Prompt Caching: 90% savings on cached input (10% of standard input cost)
OpenAI API Plans
Free tier available
Pay-as-you-go
$0.15/1M tokensBest for: Get full access to GPT-4o and GPT-4 with token-based billing and no monthly base fee ($0/mo)
- ✓Access to GPT-4o, GPT-4o-mini, o1-preview, and o1-mini models
- ✓Pay-per-token pricing for input, output, and cached tokens
- ✓Fine-tuning API access for custom model training
- ✓Access to Assistants API, Embeddings, and DALL-E image generation
- ✓Text-to-Speech (TTS) and Speech-to-Text (Whisper) APIs
Enterprise
Contact SalesBest for: This plan offers provisioned throughput, enterprise-grade security, and custom rate limits
- ✓Provisioned Throughput for dedicated capacity and consistent latency
- ✓Enterprise-grade security, SOC 2 compliance, and zero data training
- ✓Custom rate limits and higher usage thresholds
- ✓Dedicated account management and engineering support
- ✓Single Sign-On (SSO) and advanced access controls
Batch API: 50% discount on all models. Cached input tokens: 50% discount (GPT-4o, o-series). Pricing as of May 2026.
Capability Breakdown
8 differences found across 20 standardized features
- •Claude 3.5 Sonnet/Opus/Haiku
- •200K context window
- •Vision capabilities
- •Function calling
- •Streaming
- •Batch API
- •Fine-tuning (coming)
- •Safety features
- •Constitutional AI
- •Tool use
- •JSON mode
- •Enterprise tier
- •GPT-4o access
- •DALL-E 3
- •Whisper speech-to-text
- •Embeddings
- •Fine-tuning
- •Assistants API
- •Batch API
- •Vision models
- •Function calling
- •JSON mode
- •Streaming
- •Enterprise tier
Strengths & Limitations
Evaluative strengths and weaknesses: not feature lists
- +Growing user base (500K+)
- +API access for custom integrations
- +AI-powered features built in
- −Stricter content policy can refuse borderline business use cases
- −No native image generation - text and vision only
- +Access to state-of-the-art models like GPT-4o and DALL-E 3
- +Comprehensive platform: text, vision, audio, and embeddings in one API
- +Extensive documentation and a massive developer community for support
- +Advanced features like function calling and JSON mode for structured output
- +Continuously updated with the latest AI research and model improvements
- −Pay-per-use pricing can become expensive at scale without optimization
- −Strict rate limits and usage quotas can throttle high-volume applications
- −Model behavior can change between versions, requiring code updates
- −Data privacy concerns for sensitive applications due to API usage policies
- −Less control over model architecture compared to open-source alternatives
At a Glance
Recent Price History
Anthropic API (Claude) updated "Haiku 4.5" from $1/mo to Custom
Price change · May 30, 2026
Anthropic API (Claude) updated "Opus 4.6" from $5/mo to Custom
Price change · May 30, 2026
Anthropic API (Claude) updated "Sonnet 4.6" from $3/mo to Custom
Price change · May 30, 2026
Anthropic API (Claude) updated "Opus 4.7" from $5/mo to Custom
Price change · May 30, 2026
Anthropic API (Claude) added a new "Haiku 4.5" plan at $1/mo
Plan added · May 29, 2026
Plan removed · May 21, 2026
Plan added · May 21, 2026
Plan added · May 21, 2026
Frequently Asked Questions
Related Comparisons
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