Compare AI Models Side by Side

Pick 2 to 4 models to compare benchmark scores, pricing, and specs in 2026.

Claude Opus 4.8
Claude Sonnet 4.6
GPT-5.5
Claude Fable 5
Anthropic
Claude Opus 4.8

Anthropic · Claude

Anthropic
Claude Sonnet 4.6

Anthropic · Claude

OpenAI
GPT-5.5

OpenAI · GPT

Anthropic
Claude Fable 5

Anthropic · Claude

Specifications

Spec
Claude Opus 4.8
Claude Sonnet 4.6
GPT-5.5
Claude Fable 5
ProviderAnthropicAnthropicOpenAIAnthropic
FamilyClaudeClaudeGPTClaude
Release date2026-05-282026-02-172026-04-232026-06-09
Open sourceNoNoNoNo
Context window1.0M tokens1.0M tokens1.0M tokens1.0M tokens
Max output128K tokens128K tokens--128K tokens
Input price / MTok$5.00$3.00$5.00$10.00
Output price / MTok$25.00$15.00$30.00$50.00
Speed65 tok/s47 tok/s89 tok/s70 tok/s
Best forcoding, agents, reasoningcoding, agents, visioncoding, reasoning, agentscoding, agents, reasoning

Benchmark scores (% of max)

Scores normalized to percentage of each benchmark's maximum reported value. Only officially reported scores are included.

Cost per million tokens (USD)

Context window (thousands of tokens)

Output speed (tokens per second)

Notes

Claude Opus 4.8: Best of the 4.x line for complex agentic and coding work.
GPT-5.5: OpenAI's current flagship; GPT-5.5 Instant became ChatGPT's default for free users May 5 2026.
Claude Fable 5: Access suspended June 12 to July 1 2026 under US export controls; restored July 1 2026.
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Claude Opus 4.8 vs Claude Sonnet 4.6 vs GPT-5.5 vs Claude Fable 5 | AI Model Comparison