Model tracker
All models
Latest and earlier releases tracked by CheckNet. Earlier releases keep their detail pages and pricing links when a successor joins Latest releases.
| Model | Vendor | Launch date | Release |
|---|---|---|---|
| Claude Haiku 5.5 | Anthropic | 7 Oct 2026 | Latest release |
| GPT-6.1 Sol | OpenAI | 29 Sept 2026 | Latest release |
| Claude Sonnet 5.5 | Anthropic | 28 Sept 2026 | Latest release |
| Claude Opus 5.5 | Anthropic | 22 Sept 2026 | Latest release |
| GPT-6 Luna | OpenAI | 22 Sept 2026 | Latest release |
| GPT-6 Sol | OpenAI | 22 Sept 2026 | Earlier release |
| GPT-6 Astra | OpenAI | 4 Sept 2026 | Latest release |
| Claude Fable 5.1 | Anthropic | 1 Sept 2026 | Latest release |
| Claude Opus 5 | Anthropic | 24 Jul 2026 | Earlier release |
| GPT-5.6 Luna | OpenAI | 9 Jul 2026 | Earlier release |
| GPT-5.6 Sol | OpenAI | 9 Jul 2026 | Earlier release |
| Claude Sonnet 5 | Anthropic | 30 Jun 2026 | Earlier release |
| Claude Fable 5 | Anthropic | 9 Jun 2026 | Earlier release |
| Claude Haiku 4.5 | Anthropic | 15 Oct 2025 | Earlier release |
API pricing
USD per million tokens. Model-specific rates and context tiers are included below.
| Model | Launched | Input / 1M | Output / 1M | Cached / 1M | Blended / 1M |
|---|---|---|---|---|---|
| Claude Haiku 5.5AnthropicListed prices and comparisons apply to prompts up to 100K tokens. Above 100K, input costs $0.50, output $2.50 and cache reads $0.05 per million tokens. | 7 Oct 2026 | $0.10 | $0.50 | $0.01 | $0.20 |
| GPT-6.1 SolOpenAIListed rates apply up to 272K input tokens. Above 272K, input costs $4, cached input $0.20 and output $15 per million tokens for the full request. | 29 Sept 2026 | $2.00 | $10 | $0.10 | $4.00 |
| Claude Sonnet 5.5AnthropicCache reads were reduced from $0.20 to $0.10 per million tokens on 7 October 2026. | 28 Sept 2026 | $2.00 | $10 | $0.10 | $4.00 |
| Claude Opus 5.5Anthropic | 22 Sept 2026 | $4.00 | $20 | $0.20 | $8.00 |
| GPT-6 LunaOpenAI | 22 Sept 2026 | $0.10 | $0.50 | $0.01 | $0.20 |
| GPT-6 SolOpenAIListed rates apply up to 272K input tokens. Above 272K, input costs $4, cached input $0.40 and output $15 per million tokens for the full request. | 22 Sept 2026 | $2.00 | $10 | $0.20 | $4.00 |
| GPT-6 AstraOpenAI | 4 Sept 2026 | $10 | $50 | $1.00 | $20 |
| Claude Fable 5.1Anthropic | 1 Sept 2026 | $10 | $50 | $0.25 | $20 |
| Claude Opus 5Anthropic | 24 Jul 2026 | $5.00 | $25 | $0.50 | $10 |
| GPT-5.6 LunaOpenAI | 9 Jul 2026 | $0.20 | $1.20 | $0.02 | $0.45 |
| GPT-5.6 SolOpenAIPrice before the GPT-6 launch, from OpenAI's announcement. OpenRouter now lists $2 / $10. | 9 Jul 2026 | $4.00 | $20 | – | $8.00 |
| Claude Sonnet 5Anthropic | 30 Jun 2026 | $2.00 | $10 | $0.20 | $4.00 |
| Claude Fable 5Anthropic | 9 Jun 2026 | $10 | $50 | $1.00 | $20 |
| Claude Haiku 4.5Anthropic | 15 Oct 2025 | $1.00 | $5.00 | $0.10 | $2.00 |