Frontier Model APIs

Top-tier flagship models with a list input price of $2 per million tokens or more — for complex agents, long reasoning and high-stakes output.

34 available on LLM API · 34 listed

Model

Released

Input / 1M

Output / 1M

Context

GPT-6 Astra

Sep 4, 2026

$10

$50

1.1M

Try it

Claude Fable 5.1

Sep 1, 2026

$10

$50

1M

Try it

Grok 4.6

Aug 12, 2026

$2

$6

500K

Try it

Qwen 3.8 Max

Aug 3, 2026

$2

$6

1M

Try it

Claude Opus 5

Jul 26, 2026

$5

$25

1M

Try it

Kimi K3

Jul 16, 2026

$3

$15

1M

Try it

GPT-5.6 Sol

Jul 9, 2026

$5

$30

1.1M

Try it

GPT-5.6 Terra

Jul 9, 2026

$2

$12

1.1M

Try it

Grok 4.5

Jul 8, 2026

$2

$6

500K

Try it

Claude Fable 5

Jun 9, 2026

$10

$50

1M

Try it

Claude Opus 4.8

May 29, 2026

$5

$25

1M

Try it

GPT-5.5

Apr 23, 2026

$5

$30

1.1M

Try it

Claude Opus 4.7

Apr 16, 2026

$5

$25

1M

Try it

GPT-5.4

Mar 5, 2026

$2.5

$15

1.1M

Try it

GPT-5.4 Pro

Mar 5, 2026

$30

$180

1.1M

Try it

Gemini 3.1 Pro (Preview)

Feb 19, 2026

$2

$12

1M

Try it

Claude Sonnet 4.6

Feb 17, 2026

$3

$15

200K

Try it

Claude Opus 4.6

Feb 5, 2026

$5

$25

1M

Try it

GPT-5.2 Pro

Dec 11, 2025

$21

$168

400K

Try it

Claude Opus 4.5

Nov 1, 2025

$5

$25

200K

Try it

GPT-5 Pro

Aug 7, 2025

$15

$120

400K

Try it

Claude Opus 4.1

Aug 5, 2025

$15

$75

200K

Try it

GLM-4.5 X

Jul 28, 2025

$2.2

$8.9

128K

Try it

Qwen3 Coder Plus

Jul 1, 2025

$6

$60

1M

Try it

Claude Sonnet 4 (2025-05-14)

May 22, 2025

$3

$15

200K

Try it

o3

Apr 16, 2025

$2

$8

200K

Try it

GPT-4.1

Apr 14, 2025

$2

$8

1M

Try it

Pixtral Large Latest

Nov 18, 2024

$4

$12

128K

Try it

GPT-4o

May 13, 2024

$2.5

$10

128K

Try it

GPT-4 Turbo

Apr 9, 2024

$10

$30

128K

Try it

Mistral Large Latest

Feb 26, 2024

$4

$12

128K

Try it

GPT-4

Mar 14, 2023

$30

$60

8.2K

Try it

Claude Sonnet 5

—

$2

$10

1M

Try it

Video O1

Dec 5, 2024

$15

$60

200K

View model